Fix ringback on outbound skinny calls (bug #3295)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/v1-0@4816 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_skinny.c

@@ -1700,7 +1700,7 @@ static int skinny_indicate(struct ast_channel *ast, int ind)
     	}
 	switch(ind) {
 	case AST_CONTROL_RINGING:
-		if (ast->_state == AST_STATE_RINGING) {
+		if (ast->_state != AST_STATE_UP) {
 			if (!sub->progress) {		
 				transmit_tone(s, SKINNY_ALERT);
 				transmit_callstate(s, l->instance, SKINNY_RINGOUT, sub->callid);