Fix broken call pickup

There was a subtle change in ast_do_masquerade which
resulted in failed attempts to pickup calls. The problem
was that the value of the AST_FLAG_OUTGOING flag was
copied from the clone to the original channel. In the case
of call pickup, this meant that the AST_FLAG_OUTGOING flag
ended up being cleared on the channel that was attempting
to execute the pickup.

Because this flag was not set, when ast_read came across
an answer frame, it ignored it. The result of this was that
the calling channel was never properly answered.

This fix changes the behavior in ast_do_masquerade to set
the flags on the original channel to the union of the flags
on the clone channel. This way, if the AST_FLAG_OUTGOING
flag is set on either of the two channels involved in the
masquerade, the resulting channel will have the flag set
as well.

(closes issue #14206)
Reported by: francesco_r
Patches:
      14206.patch uploaded by putnopvut (license 60)
Tested by: francesco_r, aragon, putnopvut



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@170392 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/channel.c

@@ -3683,7 +3683,7 @@ int ast_do_masquerade(struct ast_channel *original)
 	/* XXX What about blocking, softhangup, blocker, and lock and blockproc? XXX */
 	/* Application and data remain the same */
 	/* Clone exception  becomes real one, as with fdno */
-	ast_copy_flags(original, clone, AST_FLAG_EXCEPTION | AST_FLAG_OUTGOING);
+	ast_set_flag(original, ast_test_flag(clone, AST_FLAG_OUTGOING | AST_FLAG_EXCEPTION));
 	original->fdno = clone->fdno;
 	/* Schedule context remains the same */
 	/* Stream stuff stays the same */