GC rejoin INVITE lacks of subject header

[GoogleCodeExporter]

RejoinGroupChatSession.createInviteRequest(...) should set a subject header as 
for any other GC INVITE.

Furthermore, RichMessaging.getGroupChatSubject(...) should skip empty GC 
subject to allow access to older entries which do contain a subject:
replace
+ EventsLogApi.EVENT_INVITED + ")", null, RichMessagingData.KEY_TIMESTAMP + " 
DESC");
by
+ EventsLogApi.EVENT_INVITED + ") AND (" + RichMessagingData.KEY_DATA + 
"!='')", null, RichMessagingData.KEY_TIMESTAMP + " DESC");

Original issue reported on code.google.com by andreas-...@telekom.de on 21 Mar 2014 at 7:50

[GoogleCodeExporter]

Original comment by lemordan...@gmail.com on 25 Mar 2014 at 9:49

• Changed state: Accepted

[GoogleCodeExporter]

revision 515

Original comment by andreas-...@telekom.de on 25 Mar 2014 at 12:40

• Changed state: Fixed