Block supports: fixing empty object in line height control

[ramonjd]

Description

In the line-height component, nativeEvent is not available on the event object for non-synthetic events,

The consequence is that dragging in the line-height control triggers an error.

index.js:64 Uncaught TypeError: Cannot read properties of undefined (reading 'inputType')
    at stateReducer (index.js:64:37)
    at reducer.ts:56:20
    at Array.reduceRight (<anonymous>)
    at reducer.ts:52:14
    at reducer.ts:147:10
    at updateReducer (react-dom.860550b4.js:15348:24)
    at Object.useReducer (react-dom.860550b4.js:16455:18)
    at useReducer (react.c58d0bd5.js:1537:23)
    at useInputControlStateReducer (reducer.ts:169:40)
    at InputField (input-field.tsx:73:33)

Testing Instructions

Insert a Paragraph and drag your mouse to change the Typography > Line height value.

The page should not bork and the line height value should be correct in the editor and frontend.

Screenshots

Types of changes

Bugfix

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• I've tested my changes with keyboard and screen readers.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).
• I've updated related schemas if appropriate.

[github-actions]

Size Change: +9 B (0%)

Total Size: 1.15 MB

Filename	Size	Change
build/block-editor/index.min.js	143 kB	+9 B (0%)

ℹ️ View Unchanged

Filename	Size
build/a11y/index.min.js	993 B
build/admin-manifest/index.min.js	1.24 kB
build/annotations/index.min.js	2.77 kB
build/api-fetch/index.min.js	2.25 kB
build/autop/index.min.js	2.15 kB
build/blob/index.min.js	487 B
build/block-directory/index.min.js	6.49 kB
build/block-directory/style-rtl.css	1.01 kB
build/block-directory/style.css	1.01 kB
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build/block-editor/default-editor-styles.css	378 B
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build/block-library/blocks/archives/editor.css	60 B
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build/block-library/blocks/archives/style.css	65 B
build/block-library/blocks/audio/editor-rtl.css	150 B
build/block-library/blocks/audio/editor.css	150 B
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build/block-library/blocks/post-excerpt/style.css	69 B
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build/data-controls/index.min.js	663 B
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build/deprecated/index.min.js	518 B
build/dom-ready/index.min.js	336 B
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_{compressed-size-action}

[ramonjd]

Ha. Fixed was merged 20 after I pushed this in #38930