BGE: Fix bug with default material and MTFace.

It set default material even if there are a MTface but no blender material.
Tested in GLSL and Multitexture.

Reviewers: HG1

source/gameengine/Converter/BL_BlenderDataConversion.cpp

@@ -1065,8 +1065,8 @@ RAS_MeshObject* BL_ConvertMesh(Mesh* mesh, Object* blenderobj, KX_Scene* scene,
 		else
 			ma = mesh->mat ? mesh->mat[mface->mat_nr]:NULL;
 
-		/* ckeck for texface since texface _only_ is used as a fallback */
-		if (ma == NULL && tface == NULL) {
+		// Check for blender material
+		if (ma == NULL) {
 			ma= &defmaterial;
 		}