Merged revisions 290542 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r290542 | twilson | 2010-10-05 21:35:51 -0700 (Tue, 05 Oct 2010) | 6 lines
  
  Don't try to send RTP when remote_address is null
  
  It is possible for ast_rtp_stop() to be called which will clear the remote
  address and cause the sendto to fail and spam warnings. Don't send in this
  case.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@290543 65c4cc65-6c06-0410-ace0-fbb531ad65f3