Improved texture creation

Fixed possible wasted space on NVidia hardware


Former-commit-id: 42a26c88d8bd03b1ac845c62984cf8c355f1902a

include/Nazara/Renderer/Texture.hpp

@@ -101,6 +101,7 @@ class NAZARA_API NzTexture : public NzResource, NzNonCopyable
 		static bool IsTypeSupported(nzImageType type);
 
 	private:
+		bool CreateTexture(bool proxy);
 		void InvalidateMipmaps();
 
 		NzTextureImpl* m_impl = nullptr;