FIX: Internal dialled calls now track properly

Programmer error is to blame for internal calls not transferring across
the call info and conversation.  I was stripping the dial prefix from
a call even if it didn't go out on the trunk.

Changed: removePrefixExpectedQueue to isExpectedQueue

Returns:
0 : Not Expected
1 : Expected but don't strip the dial prefix
2 : Expected and strip the dial prefix