[gnome-shell] calendar: Guard against null passed to setBody()

[Florian Müllner <fmuellner src gnome org>]

commit 9becb3985d1245b3b75471cfae3b5d8b5c3102a7
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Mar 10 23:55:30 2015 +0100

    calendar: Guard against null passed to setBody()

 js/ui/calendar.js |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/calendar.js b/js/ui/calendar.js
index 19d154a..cb63d6a 100644
--- a/js/ui/calendar.js
+++ b/js/ui/calendar.js
@@ -1044,7 +1044,8 @@ const Message = new Lang.Class({
 
     setBody: function(text) {
         this._bodyText = text;
-        this.bodyLabel.setMarkup(text.replace(/\n/g, ' '), this._useBodyMarkup);
+        this.bodyLabel.setMarkup(text ? text.replace(/\n/g, ' ') : '',
+                                 this._useBodyMarkup);
     },
 
     setUseBodyMarkup: function(enable) {