Bug 282183 sync xpfe listbox.xml with toolkit listbox.xml. (Bv1) nits, in the meantime. Patch by Serge GAUTHERIE <gautheri@noos.fr>, r/sr=neil

toolkit/content/widgets/listbox.xml

@@ -527,7 +527,7 @@
               newIndex = 0;
             var numItems = this.getRowCount();
             if (newIndex > numItems - 1)
-              var newIndex = numItems - 1;
+              newIndex = numItems - 1;
             var newItem = this.getItemAtIndex(newIndex);
             if (newItem) {
               this.ensureIndexIsVisible(newIndex);