get_primary_monitor() returns None

[Triggaaaaa]

Describe the bug
Upon last update to version 1.8.0 pympress does not start anymore.

To Reproduce
Launch pympress.

Expected behavior
Normal startup as before.

Environment

• OS: Arch Linux
• Wayland
• KDE
• Python version: 3.10.10
• Pympress version: 1.8.0
• Gtk 3.24.37
• GLib 2.76.1
• Poppler 23.03.0 cairo
• Cairo 1.17.8
• pycairo 1.23.0
• Installation method: Arch Linux AUR, which builds from source

Debug information

• What is reported in pympress.log?

INFO:pympress.app:Pympress: 1.8.0 ; Python: 3.10.10 ; OS: Linux 6.2.8-arch1-1 #1 SMP PREEMPT_DYNAMIC Wed, 22 Mar 2023 22:52:35 +0000 ; Gtk 3.24.37 ; GLib 2.76.1 ; Poppler 23.03.0 cairo ; Cairo 1.17.8 , pycairo 1.23.0
INFO:pympress.extras:Media support: GdkPixbuf gif player, GStreamer 1.22.1, VLC not available
CRITICAL:pympress.__main__:Uncaught exception:
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/pympress/app.py", line 227, in do_open
    self.do_activate(timestamp=GLib.get_current_time())
  File "/usr/lib/python3.10/site-packages/pympress/app.py", line 157, in do_activate
    self.gui = ui.UI(self, self.config)
  File "/usr/lib/python3.10/site-packages/pympress/ui.py", line 317, in __init__
    self.setup_screens(screen, 'at startup')
  File "/usr/lib/python3.10/site-packages/pympress/ui.py", line 484, in setup_screens
    c_monitor, p_monitor, primary, non_primary = ScreenArea.lookup_monitors(display, self.c_win, self.p_win)
  File "/usr/lib/python3.10/site-packages/pympress/ui.py", line 2022, in lookup_monitors
    prim = ScreenArea(display.get_primary_monitor().get_geometry())
AttributeError: 'NoneType' object has no attribute 'get_geometry'

• Does the problem still happen if you remove your config file?
  Yes.

Additional context
Changing get_primary_monitor() to e.g. get_monitor(0) is a workaround.

[Cimbali]

Thanks for reporting! This is he same issue as #283, and he fix is already released in v1.8.1.

[Triggaaaaa]

Thank you!
Sorry for missing #283