bitbake: toastergui: libtoaster Throw an exception no url is specified

At a minimum for this typeahead to work we need a url parameter to call
for a JSON reponse of items to filter on.

(Bitbake rev: 80b214d93c5df63a251b807ca93f81f00c6bfeb2)

Signed-off-by: Michael Wood <michael.g.wood@intel.com>
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/toastergui/static/js/libtoaster.js

@@ -15,6 +15,8 @@ var libtoaster = (function (){
    *  arg of the item.
    */
   function _makeTypeahead (jQElement, xhrUrl, xhrParams, selectedCB) {
+    if (!xhrUrl || xhrUrl.length === 0)
+      throw("No url to typeahead supplied");
 
     jQElement.typeahead({
         source: function(query, process){