#21 No group when status changed

[Adam Marks]

In IMListener.buddyStatusChanged(Buddy b), b.getGroup
() returns a blank group, even though the buddy is
associated with a group in IMListener.buddyListReceived
().

This happens in the Yahoo and AIM modules for sure.

I would not consider this as a high priority bug as I just
ignore the blank group and keep the one passed in
buddyListReceived.