video: wayland: Handle 0x0 xdg_toplevel_configure in fullscreen The xdg_shell spec seems to state[1] that xdg_toplevel_configure events can always provide a 0×0 width/height to signal that the compositor doesn't care. SDL previously assumed the provided width/height was always valid for fullscreen windows, and so applied it as-is. This broke SDL applications on KDE/KWin 5.23, which now sends 0×0 configure events (and, in 5.23.3, 1×1 events for some reason), breaking all SDL applications in fullscreen[2]. [1]: https://gitlab.freedesktop.org/wayland/wayland-protocols/-/issues/6 [2]: https://bugs.kde.org/show_bug.cgi?id=444962#c6