handling blocks in the code for building peers. The peer object destructor
does this and doing it twice will cause a crash.
(closes issue #10625, reported by and patched by pnlarsson)
git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@81433 65c4cc65-6c06-0410-ace0-fbb531ad65f3