network: fix iterating connections in NMConnectionSection

Must compare the length of the array, not the array itself.

https://bugzilla.gnome.org/show_bug.cgi?id=706262

js/ui/status/network.js

@@ -187,7 +187,7 @@ const NMConnectionSection = new Lang.Class({
 
     _getStatus: function() {
         let values = this._connectionItems.values();
-        for (let i = 0; i < values; i++) {
+        for (let i = 0; i < values.length; i++) {
             let item = values[i];
             if (item.isActive())
                 return item.getName();