find_first_merges(): remove unnecessary code

No names are ever set for the object_array_entries in merges, so there
is no need to pretend to copy them to the result array.
Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

submodule.c

@@ -893,8 +893,7 @@ static int find_first_merges(struct object_array *result, const char *path,
 		}
 
 		if (!contains_another)
-			add_object_array(merges.objects[i].item,
-					 merges.objects[i].name, result);
+			add_object_array(merges.objects[i].item, NULL, result);
 	}
 
 	free(merges.objects);