utils: Check retrun value of edje_object_file_set

In this case it not really useful as the functions returns void and
this is the last instruction anyway. Still better to have this in to
set good examples in the code.

CID 1100661

src/bin/utils.c

@@ -37,7 +37,7 @@ theme_reload(Evas_Object *edje)
 
    edje_object_file_get(edje, &file, &group);
    INF("file=%s, group=%s", file, group);
-   edje_object_file_set(edje, file, group);
+   if (!edje_object_file_set(edje, file, group)) return;
 }
 
 static void