Merged revisions 86750 via svnmerge from

Merged revisions 86750 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4

........
r86750 | russell | 2007-10-22 10:52:48 -0500 (Mon, 22 Oct 2007) | 8 lines

Don't leak a frame in the case that an END frame is received and the time since
the BEGIN is less than that of the defined minimum DTMF duration.

(closes issue #11051)
Reported by: casper
Patches:
      channel.c.86664.diff uploaded by casper (license 55)

........

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@86751 65c4cc65-6c06-0410-ace0-fbb531ad65f3