Merged revisions 75928 via svnmerge from

Merged revisions 75928 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4

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r75928 | russell | 2007-07-19 10:53:15 -0500 (Thu, 19 Jul 2007) | 14 lines

Merged revisions 75927 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.2

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r75927 | russell | 2007-07-19 10:49:42 -0500 (Thu, 19 Jul 2007) | 6 lines

When processing full frames, take sequence number wraparound into account when
deciding whether or not we need to request retransmissions by sending a VNAK.
This code could cause VNAKs to be sent erroneously in some cases, and to not
be sent in other cases when it should have been.
(closes issue #10237, reported and patched by mihai)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@75929 65c4cc65-6c06-0410-ace0-fbb531ad65f3