Fix openvr typos

Engine/source/platform/input/openVR/openVRProvider.cpp

@@ -697,7 +697,7 @@ void OpenVRProvider::onEyeRendered(U32 index)
       vr::VRCompositor()->Submit((vr::EVREye)(vr::Eye_Left + index), &eyeTexture);*/
    }
 
-   AssertFatal(err != vr::VRCompositorError_None, "VR compositor error!");
+   AssertFatal(err == vr::VRCompositorError_None, "VR compositor error!");
 }
 
 bool OpenVRProvider::_handleDeviceEvent(GFXDevice::GFXDeviceEventType evt)

Engine/source/platform/input/openVR/openVRProvider.h

@@ -49,7 +49,7 @@ public:
 
 	void advance()
 	{
-		mIndex = (mIndex + 1) & TextureCount;
+		mIndex = (mIndex + 1) % TextureCount;
 	}
 
 	GFXTexHandle& getTextureHandle()