Merged revisions 105560 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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r105560 | file | 2008-03-03 11:28:59 -0400 (Mon, 03 Mar 2008) | 7 lines

It is possible for no audio to pass between the current digit and next digit so expand logic that clears emulation to AST_FRAME_NULL.
(closes issue #11911)
Reported by: edgreenberg
Patches:
      v1-11911.patch uploaded by dimas (license 88)
Tested by: tbsky

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@105561 65c4cc65-6c06-0410-ace0-fbb531ad65f3