fixed the problem that misdn_write did not return -1 when called with 0 samples in a frame this resultet in a deadlock in some circumstances, when the call ended because of a busy extension. added encoding of keypad.

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@62885 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_misdn.c

@@ -2308,7 +2308,7 @@ static int misdn_write(struct ast_channel *ast, struct ast_frame *frame)
 
 	if ( !frame->samples ) {
 		chan_misdn_log(4, ch->bc->port, "misdn_write: zero write\n");
-		return 0;
+		return -1;
 	}
 
 	if ( ! ch->bc->addr ) {

channels/misdn/isdn_msg_parser.c

@@ -285,6 +285,10 @@ msg_t *build_setup (struct isdn_msg msgs[], struct misdn_bchannel *bc, int nt)
 			enc_ie_redir_nr(&setup->REDIR_NR, msg, 1, 1,  bc->pres, bc->screen, 0, bc->rad, nt,bc);
 	}
 
+	{
+		if (bc->keypad[0])
+			enc_ie_keypad(&setup->CALLED_PN, msg, bc->keypad, nt,bc);
+	}
 	
   
 	if (*bc->display) {