Fix IE9's lack of support for console.warn.apply

Bug: 63770
Change-Id: I8c286af374df5b5c1e7fa6b9ea1bef2ddaf5d796

diff --git a/resources/src/mediawiki/mediawiki.js b/resources/src/mediawiki/mediawiki.js
index f6154ee..e844f95 100644 (file)
--- a/resources/src/mediawiki/mediawiki.js
+++ b/resources/src/mediawiki/mediawiki.js
@@ -538,7 +538,7 @@ var mw = ( function ( $, undefined ) {
                         */
                        log.warn = function () {
                                var console = window.console;
-                               if ( console && console.warn ) {
+                               if ( console && console.warn && console.warn.apply ) {
                                        console.warn.apply( console, arguments );
                                        if ( console.trace ) {
                                                console.trace();