Bug 362060 - Rustico style change broke install.js, severely for themes (Download error -228)

Attachment 246947
p=Giorgio Maone (g.maone at informaction dot com)
r=Shaver
Actually tested this time :o

webtools/addons/public/htdocs/js/install.js

@@ -45,7 +45,7 @@ function install( aEvent, extName, iconURL, extHash)  {
     if (aEvent.altKey || !window.InstallTrigger)
         return true;
 
-    var url = getInstallURL();
+    var url = getInstallURL(aEvent);
 
     if (url && url.match(/^.+\.xpi$/)) {