### Godot version

4.0 Beta 11

### System information

Windows 10 version 22H2, GeForce Game Ready Driver Version 528.02, GTX 1070

### Issue description

Since Beta 11 this error is given whenever a project is run in the forward+ renderer with OpenXR enabled. This error is not present with Beta 10 and previous versions.
![image](https://user-images.githubusercontent.com/38119387/212044209-1179b908-f010-47a1-ae53-bc2faadc30de.png)

I've tested with projects created in previous versions as well as the current version (Beta 11)

### Steps to reproduce

Create project, enable OpenXR in project settings, and run.

### Minimal reproduction project

N/A
ERR_FAIL_COND_V(instance == XR_NULL_HANDLE, false);
	XrEventDataBuffer runtimeEvent;
	runtimeEvent.type = XR_TYPE_EVENT_DATA_BUFFER;
	runtimeEvent.next = nullptr;
	
	XrResult pollResult = xrPollEvent(instance, &runtimeEvent);
	while (pollResult == XR_SUCCESS) {
		bool handled = false;
		for (OpenXRExtensionWrapper *wrapper : registered_extension_wrappers) {
			handled |= wrapper->on_event_polled(runtimeEvent);
		}
		switch (runtimeEvent.type) {
			case XR_TYPE_EVENT_DATA_EVENTS_LOST: {
				XrEventDataEventsLost *event = (XrEventDataEventsLost *)&runtimeEvent;
				
				WARN_PRINT("OpenXR EVENT: " + itos(event->lostEventCount) + " event data lost!");
			} break;
			case XR_TYPE_EVENT_DATA_VISIBILITY_MASK_CHANGED_KHR: {
				
				
				
				
				print_verbose("OpenXR EVENT: STUB: visibility mask changed");
			} break;