### 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
class OpenXRInterface;
class OpenXRAPI {
private:
	
	static OpenXRAPI *singleton;
	
	static Vector<OpenXRExtensionWrapper *> registered_extension_wrappers;
	
	OpenXRInterface *xr_interface = nullptr;
	
	uint32_t num_layer_properties = 0;
	XrApiLayerProperties *layer_properties = nullptr;
	
	uint32_t num_supported_extensions = 0;
	XrExtensionProperties *supported_extensions = nullptr;
	Vector<CharString> enabled_extensions;
	
	Vector<OpenXRCompositionLayerProvider *> composition_layer_providers;
	
	uint32_t num_view_configuration_types = 0;
	XrViewConfigurationType *supported_view_configuration_types = nullptr;