- optimization of texture scaling checks.

The texture dimension checks can be performed up front when the texture is inserted into the texture manager.

src/common/textures/hw_material.cpp

@@ -78,7 +78,7 @@ FMaterial::FMaterial(FGameTexture * tx, int scaleflags)
 		}
 
 		// Note that these layers must present a valid texture even if not used, because empty TMUs in the shader are an undefined condition.
-		imgtex->CreateDefaultBrightmap();
+		tx->CreateDefaultBrightmap();
 		auto placeholder = TexMan.GameByIndex(1);
 		if (imgtex->Brightmap)
 		{