Merge pull request php-debugbar#186 from arnaudroulee/master

Fix IE resize

Author: barryvdh

src/DebugBar/Resources/debugbar.js

@@ -414,6 +414,8 @@ if (typeof(PhpDebugBar) == 'undefined') {
          * @this {DebugBar}
          */
         registerResizeHandler: function() {
+            if (typeof this.resize.bind == 'undefined') return;
+
             var f = this.resize.bind(this);
             this.respCSSSize = 0;
             $(window).resize(f);