### Godot version

2992ffd25523cb8b3e0ef1b873c40115b8940178

### System information

Windows 10

### Issue description

Godot crashes randomly within a few seconds after project start when moving with the mouse.

![win_err](https://github.com/godotengine/godot/assets/52464204/1da28596-d95b-40f3-b32f-12219ec02c5d)

Started after recent merge of https://github.com/godotengine/godot/pull/67791.
I can confirm that reverting the pr fixes the crashes.

### Steps to reproduce

see desc

### Minimal reproduction project

N/A
String ret;
	Window selection_owner = XGetSelectionOwner(x11_display, p_source);
	if (selection_owner == x11_window) {
		static const char *target_type = "PRIMARY";
		if (p_source != None && get_atom_name(x11_display, p_source) == target_type) {
			return internal_clipboard_primary;
		} else {
			return internal_clipboard;
		}
	}
	if (selection_owner != None) {
		
		MutexLock mutex_lock(events_mutex);
		Atom selection = XA_PRIMARY;
		XConvertSelection(x11_display, p_source, target, selection,
				x11_window, CurrentTime);
		XFlush(x11_display);
		
		XEvent event;
		XIfEvent(x11_display, &event, _predicate_clipboard_selection, (XPointer)&x11_window);
		
		Atom type;
		int format, result;
		unsigned long len, bytes_left, dummy;
		unsigned char *data;
		XGetWindowProperty(x11_display, x11_window,
				selection,