Merged revisions 318499 via svnmerge from

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

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  r318499 | rmudgett | 2011-05-10 18:41:08 -0500 (Tue, 10 May 2011) | 15 lines
  
  Unable to pickup DAHDI/PRI call because call state is reported as DIALING.
  
  The channel state is not updated to RINGING when an ALERTING message is
  received.  Regression caused when sig_pri.c (also sig_ss7.c) extracted
  from chan_dahdi.c.
  
  * Added missing channel state update to RINGING when the
  AST_CONTROL_RINGING frame is queued for ISDN and SS7.
  
  (closes issue #19257)
  Reported by: alecdavis
  Patches:
        issue19257_v1.8_v2.patch uploaded by rmudgett (license 664)
  Tested by: alecdavis, rmudgett
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@318500 65c4cc65-6c06-0410-ace0-fbb531ad65f3