interface {} is nil, not int32 panic when calling AmmoReserve on POV demo

[hjbdev]

Describe the bug
Calling the AmmoReserve method panics during this particular demo.

Stack trace:

panic: interface conversion: interface {} is nil, not int32
        stacktrace:
        goroutine 7 [running]:
        runtime/debug.Stack()
                C:/Program Files/Go/src/runtime/debug/stack.go:26 +0x5e
        github.com/markus-wa/demoinfocs-golang/v4/pkg/demoinfocs.NewParserWithConfig.func1({0x452620, 0xc0005dcce0})
                C:/Users/Harry/go/pkg/mod/github.com/markus-wa/demoinfocs-golang/[email protected]/pkg/demoinfocs/parser.go:404 +0x2a
        github.com/markus-wa/godispatch.(*Dispatcher).dispatchWithRecover.func1()
                C:/Users/Harry/go/pkg/mod/github.com/markus-wa/[email protected]/dispatch.go:197 +0x3b
        panic({0x452620?, 0xc0005dcce0?})
                C:/Program Files/Go/src/runtime/panic.go:785 +0x132
        github.com/markus-wa/godispatch.callConsumerCode.func1()
                C:/Users/Harry/go/pkg/mod/github.com/markus-wa/[email protected]/dispatch.go:122 +0x4d
        panic({0x452620?, 0xc0005dccd0?})
                C:/Program Files/Go/src/runtime/panic.go:785 +0x132
        github.com/markus-wa/godispatch.callConsumerCode.func1()
                C:/Users/Harry/go/pkg/mod/github.com/markus-wa/[email protected]/dispatch.go:122 +0x4d
        panic({0x427ac0?, 0xc0012ac000?})
                C:/Program Files/Go/src/runtime/panic.go:785 +0x132
        github.com/markus-wa/demoinfocs-golang/v4/pkg/demoinfocs/sendtables.PropertyValue.Int(...)
                C:/Users/Harry/go/pkg/mod/github.com/markus-wa/demoinfocs-golang/[email protected]/pkg/demoinfocs/sendtables/propdecoder.go:137
        github.com/markus-wa/demoinfocs-golang/v4/pkg/demoinfocs/common.(*Equipment).AmmoReserve(0xc000db0140)
                C:/Users/Harry/go/pkg/mod/github.com/markus-wa/demoinfocs-golang/[email protected]/pkg/demoinfocs/common/equipment.go:421 +0x20e
        main.main.func1({})
                C:/Users/Harry/Dev/stratbox/lib/2d-replay-generator/bugrepro.go:24 +0xdf
        reflect.Value.call({0x3ef7e0?, 0xc000008660?, 0xc00369d760?}, {0x5157f7, 0x4}, {0xc004f5f780, 0x1, 0x0?})
                C:/Program Files/Go/src/reflect/value.go:581 +0xca6
        reflect.Value.Call({0x3ef7e0?, 0xc000008660?, 0xbe9a2?}, {0xc004f5f780?, 0x0?, 0x9a00000000000001?})
                C:/Program Files/Go/src/reflect/value.go:365 +0xb9
        github.com/markus-wa/godispatch.callConsumerCode({0x3ef7e0?, 0xc000008660?, 0xc004f5f798?}, {0xc004f5f780?, 0x0?, 0xc004f5f778?})
                C:/Users/Harry/go/pkg/mod/github.com/markus-wa/[email protected]/dispatch.go:125 +0x3f
        github.com/markus-wa/godispatch.(*Dispatcher).Dispatch(0xc000098180, {0x41cf00, 0x91e2c0})
                C:/Users/Harry/go/pkg/mod/github.com/markus-wa/[email protected]/dispatch.go:111 +0x1f5
        github.com/markus-wa/demoinfocs-golang/v4/pkg/demoinfocs.(*parser).handleFrameParsed(0xc00007b6c0, 0x0?)
                C:/Users/Harry/go/pkg/mod/github.com/markus-wa/demoinfocs-golang/[email protected]/pkg/demoinfocs/parsing.go:539 +0x38
        reflect.Value.call({0x3f03e0?, 0xc000042d60?, 0x0?}, {0x5157f7, 0x4}, {0xc004f5fef0, 0x1, 0xe0585?})
                C:/Program Files/Go/src/reflect/value.go:581 +0xca6
        reflect.Value.Call({0x3f03e0?, 0xc000042d60?, 0xbe9a2?}, {0xc004f5fef0?, 0x1ddc89092ae2c?, 0xd90000c00007b880?})
                C:/Program Files/Go/src/reflect/value.go:365 +0xb9
        github.com/markus-wa/godispatch.callConsumerCode({0x3f03e0?, 0xc000042d60?, 0xc004f5ff08?}, {0xc004f5fef0?, 0xc004f5fec0?, 0xc0003ced00?})
                C:/Users/Harry/go/pkg/mod/github.com/markus-wa/[email protected]/dispatch.go:125 +0x3f
        github.com/markus-wa/godispatch.(*Dispatcher).Dispatch(0xc000098120, {0x3daea0, 0x91e2c0})
                C:/Users/Harry/go/pkg/mod/github.com/markus-wa/[email protected]/dispatch.go:111 +0x1f5
        github.com/markus-wa/godispatch.(*Dispatcher).dispatchWithRecover(0xc000098120?, {0x3daea0?, 0x91e2c0?})
                C:/Users/Harry/go/pkg/mod/github.com/markus-wa/[email protected]/dispatch.go:202 +0x49
        github.com/markus-wa/godispatch.(*Dispatcher).dispatchQueue(0xc000098120, 0xc0000c72d0)
                C:/Users/Harry/go/pkg/mod/github.com/markus-wa/[email protected]/dispatch.go:177 +0xd0
        created by github.com/markus-wa/godispatch.(*Dispatcher).AddQueues in goroutine 1
                C:/Users/Harry/go/pkg/mod/github.com/markus-wa/[email protected]/dispatch.go:162 +0x17f


goroutine 1 [running]:
main.checkError(...)
        C:/Users/Harry/Dev/stratbox/lib/2d-replay-generator/bugrepro.go:39
main.main()
        C:/Users/Harry/Dev/stratbox/lib/2d-replay-generator/bugrepro.go:34 +0x185
exit status 2

To Reproduce
https://wompwomp.ams3.digitaloceanspaces.com/harry.dem

Code:

package main

import (
	"fmt"
	"os"

	ex "github.com/markus-wa/demoinfocs-golang/v4/examples"
	demoinfocs "github.com/markus-wa/demoinfocs-golang/v4/pkg/demoinfocs"
	events "github.com/markus-wa/demoinfocs-golang/v4/pkg/demoinfocs/events"
)

func main() {
	f, err := os.Open(ex.DemoPathFromArgs())
	checkError(err)
	defer f.Close()

	p := demoinfocs.NewParser(f)
	defer p.Close()

	p.RegisterEventHandler(func(e events.FrameDone) {
		gs := p.GameState()
		for _, p := range gs.Participants().Playing() {
			for _, equipment := range p.Inventory {
				reserveAmmo := equipment.AmmoReserve()

				// hacky way to call the getter but not spam the console. Ignore this bit.
				if reserveAmmo == 200 {
					fmt.Println("equipment", equipment.String(), "ammo in reserve", equipment.AmmoReserve())
				}
			}
		}
	})

	err = p.ParseToEnd()
	checkError(err)
}

func checkError(err error) {
	if err != nil {
		panic(err)
	}
}

Expected behavior
No panic

Library version
v4.3.0, also tried master up to 5125a5a9c0252028c17ddab9d2922797ec6bc272

Additional context
Windows 11