Merged revisions 107161 via svnmerge from

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

........
r107161 | russell | 2008-03-10 15:17:11 -0500 (Mon, 10 Mar 2008) | 8 lines

Fix another bug specifically related to asynchronous call origination.  Once the
PBX is started on the channel using ast_pbx_start(), then the ownership of the
channel has been passed on to another thread.  We can no longer access it in this
code.  If the channel gets hung up very quickly, it is possible that we could
access a channel that has been free'd.

(inspired by BE-386)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@107162 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/pbx.c

@@ -6545,9 +6545,9 @@ int ast_pbx_outgoing_exten(const char *type, int format, void *data, int timeout
 							ast_channel_unlock(chan);
 						}
 						ast_hangup(chan);
-						chan = NULL;
 						res = -1;
 					}
+					chan = NULL;
 				}
 			} else {
 				ast_verb(4, "Channel %s was never answered.\n", chan->name);