Merged revisions 141806 via svnmerge from

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

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r141806 | russell | 2008-09-08 16:02:36 -0500 (Mon, 08 Sep 2008) | 7 lines

When doing an async goto, detect if the channel is already in the middle of a
masquerade.  This can happen when chan_local is trying to optimize itself out.
If this happens, fail the async goto instead of bursting into flames.

(closes issue #13435)
Reported by: geoff2010

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