Merged revisions 338904 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/10

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  r338904 | irroot | 2011-10-02 16:17:32 +0200 (Sun, 02 Oct 2011) | 8 lines
  
  Remove T38 Gateway capability when detaching framehook.
  
  SET(FAXOPT(gateway)=no) does not remove the capability when 
  detaching the framehook.
  
  small patch to fix this problem.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@338905 65c4cc65-6c06-0410-ace0-fbb531ad65f3