Merged revisions 37856 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.2

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r37856 | russell | 2006-07-17 20:41:47 -0400 (Mon, 17 Jul 2006) | 2 lines

don't crash if the frame has no data, but has a src

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@37857 65c4cc65-6c06-0410-ace0-fbb531ad65f3