Committing a fix that was introduced a long time

ago (does not affect 1.4), where you would pass
a pointer to the end of a character array, and
ast_uri_decode would do no good.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@133651 65c4cc65-6c06-0410-ace0-fbb531ad65f3