fix syntax error, and actually show error if minification fails

public/src/modules/notifications.js

@@ -86,7 +86,7 @@ define('notifications', ['sounds', 'translator', 'components'], function(sound,
 					});
 				};
 			} else {
-				payload.message: '[[notifications:you_have_unread_notifications]]';
+				payload.message = '[[notifications:you_have_unread_notifications]]';
 				payload.type = 'warning';
 			}
 

src/meta/js.js

@@ -128,8 +128,9 @@ module.exports = function(Meta) {
 			case 'error':
 				winston.error('[meta/js] Could not compile ' + target + ': ' + message.payload.message);
 				minifier.kill();
+
 				if (typeof callback === 'function') {
-					callback(new Error(message.payload.message));
+					callback(new Error(message.payload));
 				} else {
 					process.exit(0);
 				}