added new hook for messaging teaser retrieval, and casting input as String before execuring stripTags templates helper

public/src/modules/helpers.js

@@ -69,10 +69,10 @@
 
 	helpers.stripTags = function (str) {
 		if (typeof S !== 'undefined') {
-			return S(str).stripTags().s;
+			return S(String(str)).stripTags().s;
 		} else {
 			var S = require('string');
-			return S(str).stripTags().s;
+			return S(String(str)).stripTags().s;
 		}
 	};
 

src/messaging.js

@@ -210,7 +210,9 @@ Messaging.getTeaser = function (uid, roomId, callback) {
 		},
 		function (user, next) {
 			teaser.user = user;
-			next(null, teaser);
+			plugins.fireHook('filter:messaging.getTeaser', { teaser: teaser }, function (err, data) {
+				next(err, data.teaser);
+			});
 		}
 	], callback);
 };