Merged revisions 231741 via svnmerge from

Merged revisions 231741 via svnmerge from
https://origsvn.digium.com/svn/asterisk/trunk

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  r231741 | mnicholson | 2009-12-01 09:47:36 -0600 (Tue, 01 Dec 2009) | 9 lines

  Merged revisions 231740 via svnmerge from
  https://origsvn.digium.com/svn/asterisk/branches/1.4

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    r231740 | mnicholson | 2009-12-01 09:34:57 -0600 (Tue, 01 Dec 2009) | 2 lines

    Ignore unknown formats in ast_format_str_reduce() and return an error if no know formats are found.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.1@231742 65c4cc65-6c06-0410-ace0-fbb531ad65f3