Set default white texture for diffuse mat

src/models.c

@@ -2846,6 +2846,8 @@ static Model LoadOBJ(const char *fileName)
             } tinyobj_material_t;
             */
 
+            model.materials[m].maps[MAP_DIFFUSE].texture = GetTextureDefault();     // Get default texture, in case no texture is defined
+            
             if (materials[m].diffuse_texname != NULL) model.materials[m].maps[MAP_DIFFUSE].texture = LoadTexture(materials[m].diffuse_texname);  //char *diffuse_texname; // map_Kd
             model.materials[m].maps[MAP_DIFFUSE].color = (Color){ (float)(materials[m].diffuse[0]*255.0f), (float)(materials[m].diffuse[1]*255.0f), (float)(materials[m].diffuse[2]*255.0f), 255 }; //float diffuse[3];
             model.materials[m].maps[MAP_DIFFUSE].value = 0.0f;