added trinagulate notice

src/engine/loaders/obj_loader.cpp

@@ -28,6 +28,7 @@ ObjLoader::~ObjLoader() {}
 
 /** Parse .obj file, allocate output data and store it. Multitexture support
  * Notice: At this moment textures names are MATERIAL names from .obj file!
+ * Notice 2: Faces MUST be triangulated (check out blender export settings).
  */
 void ObjLoader::load(ObjModel *o_result, char *t_filename, float t_scale)
 {