check nid before pusing and marking read

src/notifications.js

@@ -120,6 +120,11 @@ var async = require('async'),
 
 	Notifications.push = function(notification, uids, callback) {
 		callback = callback || function() {};
+
+		if (!notification.nid) {
+			return callback();
+		}
+
 		var websockets = require('./socket.io');
 		if (!Array.isArray(uids)) {
 			uids = [uids];
@@ -183,7 +188,7 @@ var async = require('async'),
 			return callback();
 		}
 
-		var notificationKeys = nids.map(function(nid) {
+		var notificationKeys = nids.filter(Boolean).map(function(nid) {
 			return 'notifications:' + nid;
 		});
 

src/user/notifications.js

@@ -71,10 +71,8 @@ var async = require('async'),
 							winston.info('[notifications.get] nid ' + nids[index] + ' not found. Removing.');
 						}
 
-						if (nids[index]) {
 						deletedNids.push(nids[index]);
 					}
-					}
 				});
 
 				if (deletedNids.length) {