Merged revisions 346763 via svnmerge from

Merged revisions 346763 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/10

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  r346763 | may | 2011-12-02 20:42:32 +0400 (Fri, 02 Dec 2011) | 14 lines

  Merged revisions 346762 via svnmerge from
  https://origsvn.digium.com/svn/asterisk/branches/1.8

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    r346762 | may | 2011-12-02 20:19:19 +0400 (Fri, 02 Dec 2011) | 7 lines

    process null frame pointer returned by ast_rtp_instance_read correctly

    (closes issue ASTERISK-16697)
    Reported by: under
    Patches:
            segfault.diff (License #5871) patch uploaded by under
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@346777 65c4cc65-6c06-0410-ace0-fbb531ad65f3