Fix T103441: make OBJ importer ignore any unrecognized trailing per-face index data.

Some files out there (e.g. in T103441) contain face definitions with
four indices, which the importer code was not expecting. The OBJ
standard spells out up to three indices per face corner; the file in
there must be using some sort of non-standard OBJ syntax extension.
Now the code simply ignores any trailing per-face-corner data.

source/blender/io/wavefront_obj/importer/obj_import_file_reader.cc

@@ -252,6 +252,8 @@ static void geom_add_polygon(Geometry *geom,
     geom->face_corners_.append(corner);
     curr_face.corner_count_++;
 
+    /* Some files contain extra stuff per face (e.g. 4 indices); skip any remainder (T103441). */
+    p = drop_non_whitespace(p, end);
     /* Skip whitespace to get to the next face corner. */
     p = drop_whitespace(p, end);
   }