Fixed GpuQuery bug

Also added GpuQuery::GetOpenGLID()


Former-commit-id: 2a5d01a945ffeb576b5dce6756dbffcc511c237c

include/Nazara/Renderer/GpuQuery.hpp

@@ -24,10 +24,14 @@ class NAZARA_API NzGpuQuery : NzNonCopyable
 
 		bool IsResultAvailable() const;
 
+		// Fonctions OpenGL
+		unsigned int GetOpenGLID() const;
+
 		static bool IsModeSupported(nzGpuQueryMode mode);
 		static bool IsSupported();
 
 	private:
+		nzGpuQueryMode m_mode;
 		unsigned int m_id;
 };