Merged revisions 91777 via svnmerge from

Merged revisions 91777 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4

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r91777 | russell | 2007-12-07 10:08:35 -0600 (Fri, 07 Dec 2007) | 6 lines

* Add a bit more of a verbose comment as to why a hangup frame needs to be
  queued up if autoservice gets a NULL return from ast_read().
* Make the process of queueing the hangup frame more efficient by putting the
  frame where it is going to end up and avoiding some locking and extra memory
  allocations and freeing.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@91778 65c4cc65-6c06-0410-ace0-fbb531ad65f3