Merged revisions 176701 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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  r176701 | jpeeler | 2009-02-17 15:54:34 -0600 (Tue, 17 Feb 2009) | 17 lines
  
  Modify bridging to properly evaluate DTMF after first warning is played
  
  The main problem is currently if the Dial flag L is used with a warning sound,
  DTMF is not evaluated after the first warning sound. To fix this, a flag has 
  been added in ast_generic_bridge for playing the warning which ensures that if
  a scheduled warning is missed, multiple warrnings are not played back (due to a
  feature evaluation or waiting for digits). ast_channel_bridge was modified to
  store the nexteventts in the ast_bridge_config structure as that information
  was lost every time ast_channel_bridge was reentered, causing a hangup due to
  incorrect time calculations.
  
  (closes issue #14315)
  Reported by: tim_ringenbach
 
  Reviewed on reviewboard:
  http://reviewboard.digium.com/r/163/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@176708 65c4cc65-6c06-0410-ace0-fbb531ad65f3