Loupe crashes on start with GTK 4.17: gdk_display_manager_get() was called before gtk_init()

GTK 4.17 introduced a new check for things that call gdk_display_manager_get() before gtk_init(). Loupe falls foul of this and crashes immediately on startup with GTK 4.17:

[adamw@xps13a ~]$ loupe 

(process:34364): Gdk-ERROR **: 09:49:33.410: gdk_display_manager_get() was called before gtk_init()
Trace/breakpoint trap (core dumped)