Set the length of the ast_sockaddr, so that we can set it's port later.

Without this, the call to ast_sockaddr_set_port a few lines later is a noop.
........

Merged revisions 355901 from http://svn.asterisk.org/svn/asterisk/branches/1.8
........

Merged revisions 355902 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@355903 65c4cc65-6c06-0410-ace0-fbb531ad65f3