Merged revisions 260050 via svnmerge from

Merged revisions 260050 via svnmerge from
https://origsvn.digium.com/svn/asterisk/trunk

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  r260050 | dvossel | 2010-04-29 10:33:27 -0500 (Thu, 29 Apr 2010) | 21 lines

  Merged revisions 260049 via svnmerge from
  https://origsvn.digium.com/svn/asterisk/branches/1.4

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    r260049 | dvossel | 2010-04-29 10:31:02 -0500 (Thu, 29 Apr 2010) | 14 lines

    Fixes crash in audiohook_write_list

    The middle_frame in the audiohook_write_list function was
    being freed if a audiohook manipulator returned a failure.
    This is incorrect logic.  This patch resolves this and
    adds detailed descriptions of how this function should work
    and why manipulator failures must be ignored.

    (closes issue #17052)
    Reported by: dvossel
    Tested by: dvossel

    (closes issue #16196)
    Reported by: atis

    Review: https://reviewboard.asterisk.org/r/623/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@260051 65c4cc65-6c06-0410-ace0-fbb531ad65f3