Merged revisions 198437 via svnmerge from

Merged revisions 198437 via svnmerge from
https://origsvn.digium.com/svn/asterisk/trunk

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  r198437 | eliel | 2009-05-30 21:22:15 -0400 (Sat, 30 May 2009) | 11 lines

  Avoid a crash when res_timing_dahdi is unloaded but wasn't properly loaded.

  if dahdi_test_timer() fails, timing_funcs_handle remains NULL causing a crash
  when calling ast_unregister_timing_interface() with a NULL pointer.

  (closes issue #15234)
  Reported by: eliel
  Patches:
        timing_dahdi1.diff uploaded by eliel (license 64)
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.1@198441 65c4cc65-6c06-0410-ace0-fbb531ad65f3