### 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
XrSystemGetInfo system_get_info = {
		XR_TYPE_SYSTEM_GET_INFO, 
		nullptr, 
		form_factor 
	};
	XrResult result = xrGetSystem(instance, &system_get_info, &system_id);
	if (XR_FAILED(result)) {
		print_line("OpenXR: Failed to get system for our form factor [", get_error_string(result), "]");
		return false;
	}
	
	void *next_pointer = nullptr;
	for (OpenXRExtensionWrapper *wrapper : registered_extension_wrappers) {
		void *np = wrapper->set_system_properties_and_get_next_pointer(next_pointer);
		if (np != nullptr) {
			next_pointer = np;
		}