Merged revisions 189911 via svnmerge from

https://origsvn.digium.com/svn/asterisk/trunk

........
  r189911 | tilghman | 2009-04-22 11:01:30 -0500 (Wed, 22 Apr 2009) | 7 lines
  
  Do not continue to receive DTMF, when the channel is hungup and about to be destroyed.
  (closes issue #14858)
   Reported by: barryf
   Patches: 
         20090421__bug14858.diff.txt uploaded by tilghman (license 14)
   Tested by: barryf
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@189914 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_unistim.c

@@ -2474,7 +2474,7 @@ static int unistim_do_senddigit(struct unistimsession *pte, char digit)
 	struct ast_frame f = { 0, };
 	struct unistim_subchannel *sub;
 	sub = pte->device->lines->subs[SUB_REAL];
-	if (!sub->owner) {
+	if (!sub->owner || sub->alreadygone) {
 		ast_log(LOG_WARNING, "Unable to find subchannel in dtmf senddigit\n");
 		return -1;
 	}
@@ -4224,8 +4224,8 @@ static int unistim_senddigit_end(struct ast_channel *ast, char digit, unsigned i
 
 	sub = pte->device->lines->subs[SUB_REAL];
 
-	if (!sub->owner) {
-		ast_log(LOG_WARNING, "Unable to find subchannel in dtmf senddigiti_end\n");
+	if (!sub->owner || sub->alreadygone) {
+		ast_log(LOG_WARNING, "Unable to find subchannel in dtmf senddigit_end\n");
 		return -1;
 	}