### 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
if (!can_render()) {
		return false;
	}
	
	
	for (int i = 0; i < OPENXR_SWAPCHAIN_MAX; i++) {
		if (!swapchains[i].image_acquired && swapchains[i].swapchain != XR_NULL_HANDLE) {
			if (!acquire_image(swapchains[i])) {
				return false;
			}
			swapchains[i].image_acquired = true;
		}
	}
	return true;
}
RID OpenXRAPI::get_color_texture() {
	if (swapchains[OPENXR_SWAPCHAIN_COLOR].image_acquired) {
		return graphics_extension->get_texture(swapchains[OPENXR_SWAPCHAIN_COLOR].swapchain_graphics_data, swapchains[OPENXR_SWAPCHAIN_COLOR].image_index);
	} else {
		return RID();
	}
}
RID OpenXRAPI::get_depth_texture() {