active_admin_image_path is gone

Author: fabn

app/assets/stylesheets/active_admin/active_admin_globalize_flags.css.sass

@@ -6,7 +6,7 @@
   width: 16px
   height: 11px
   vertical-align: middle
-  background: url(active_admin_image_path('flags.png')) no-repeat
+  background: image-url('active_admin/flags.png') no-repeat
   &.flag-ar // originally flag-ae
     background-position: -16px 0
   &.flag-br