Merged revisions 178205 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r178205 | file | 2009-02-24 11:16:07 -0400 (Tue, 24 Feb 2009) | 9 lines
  
  Skip check for extension when subscribing for MWI.
  
  Since the remote side is not actually subscribing to a specific extension when
  subscribing for MWI just skip the check to see if the extension exists. They can't use it
  to specify the mailbox either since we require configuration of that in sip.conf
  
  (closes issue #14531)
  Reported by: festr
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@178213 65c4cc65-6c06-0410-ace0-fbb531ad65f3