mw.loader: Don't create addScript() callback if we don't need one

$.Deferred#always ($.Callbacks#add) ignores undefined/null. No
need to create an inline function that does nothing.

Change-Id: Ifd96ac13e03242279e7d584cf91d899adadfed91

diff --git a/resources/src/mediawiki/mediawiki.js b/resources/src/mediawiki/mediawiki.js
index b22e240..57838d4 100644 (file)
--- a/resources/src/mediawiki/mediawiki.js
+++ b/resources/src/mediawiki/mediawiki.js
@@ -1069,11 +1069,7 @@
                                                crossDomain: true,
                                                cache: true,
                                                async: true
-                                       } ).always( function () {
-                                               if ( callback  ) {
-                                                       callback();
-                                               }
-                                       } );
+                                       } ).always( callback );
                                } else {
                                        /*jshint evil:true */
                                        document.write( mw.html.element( 'script', { 'src': src }, '' ) );