Handle null values better.

git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/trunk@1137 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/admin/TabsTag.java

@@ -181,6 +181,9 @@ public class TabsTag extends BodyTagSupport {
     }
 
     private String i18n(String in) {
+        if (in == null) {
+            return null;
+        }
         // Look for the key symbol:
         if (in.indexOf("${") == 0 && in.indexOf("}") == in.length()-1) {
             return LocaleUtils.getLocalizedString(in.substring(2, in.length()-1));