Merged revisions 318921 via svnmerge from

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

........
  r318921 | bbryant | 2011-05-13 14:09:34 -0400 (Fri, 13 May 2011) | 8 lines

  Fixes a segmentation fault in dynamic hints when a channel technology isn't
  loaded for a hint.

  (closes issue #18495)
  Reported by: bertrand
  Tested by: bertrand
........

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@318922 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/main/channel.c b/main/channel.c
index 35fdea7..74541ab 100644 (file)
--- a/main/channel.c
+++ b/main/channel.c
@@ -3882,7 +3882,7 @@ static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio)
                        }
                        /* Clear the exception flag */
                        ast_clear_flag(chan, AST_FLAG_EXCEPTION);
-               } else if (chan->tech->read)
+               } else if (chan->tech && chan->tech->read)
                        f = chan->tech->read(chan);
                else
                        ast_log(LOG_WARNING, "No read routine on channel %s\n", chan->name);