Merged revisions 337219 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/10

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  r337219 | oej | 2011-09-21 11:32:50 +0200 (Ons, 21 Sep 2011) | 13 lines
  
  Make ast_pbx_run() not default to s@default if extension is not found
  
  Review: https://reviewboard.asterisk.org/r/1446/
  
  This is a bug - or architecture mistake - that has been in Asterisk for a 
  very long time. It was exposed by the AMI originate action and possibly
  some other applications. Most channel drivers checks if an extension
  exists BEFORE starting a pbx on an inbound call, so most calls will
  not depend on this issue.
  
  Thanks everyone involved in the review and on IRC and the mailing list
  for a quick review and all the feedback.

  (closes issue ASTERISK-18578)
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@337220 65c4cc65-6c06-0410-ace0-fbb531ad65f3