Fixed NPE retrieving the user's roster.

git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/trunk@306 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/messenger/user/spi/UserImpl.java

@@ -239,7 +239,7 @@ public class UserImpl implements User, Cacheable {
         else {
             // Not in cache so load a new one:
             roster = new CachedRosterImpl(username);
-            CacheManager.getCache("userame2roster").put(username, roster);
+            CacheManager.getCache("username2roster").put(username, roster);
         }
         return roster;
     }