undefined is empty. Fixed bug where empty bingWords with old accounts which...

undefined is empty. Fixed bug where empty bingWords with old accounts which hadn't logged in didn't send notifications.

webclient/components/matrix/event-handler-service.js

@@ -189,7 +189,7 @@ function(matrixService, $rootScope, $q, $timeout, mPresence) {
                 
                 // always bing if there are 0 bing words... apparently.
                 var bingWords = matrixService.config().bingWords;
-                if (bingWords && bingWords.length === 0) {
+                if (bingWords === undefined || bingWords.length === 0) {
                     shouldBing = true;
                 }