Merged revisions 134814 via svnmerge from

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

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r134814 | russell | 2008-07-31 11:45:31 -0500 (Thu, 31 Jul 2008) | 7 lines

In case we have some processing threads that free more frames than they allocate,
do not let the frame cache grow forever.

(closes issue #13160)
Reported by: tavius
Tested by: tavius, russell

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@134815 65c4cc65-6c06-0410-ace0-fbb531ad65f3