Merged revisions 318142 via svnmerge from

Merged revisions 318142 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.8

........
  r318142 | mnicholson | 2011-05-09 09:09:38 -0500 (Mon, 09 May 2011) | 9 lines

  Make indicate/control frames WRITE events on framehooks.  Also, if a framehook
  returns a non-control frame, don't forward it to the channel.

  (closes issue #19251)
  Reported by: irroot
  Patches:
        (modified) framehook_indicate.patch2 uploaded by irroot (license 52)
  Tested by: irroot
........

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@318143 65c4cc65-6c06-0410-ace0-fbb531ad65f3