Don't allow Answer() to accept a negative argument.

Negative argument means an infinite delay and we
don't want that.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@136635 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/pbx.c

@@ -7655,6 +7655,10 @@ static int pbx_builtin_answer(struct ast_channel *chan, void *data)
 	if ((chan->_state != AST_STATE_UP) && !ast_strlen_zero(data))
 		delay = atoi(data);
 
+	if (delay < 0) {
+		delay = 0;
+	}
+
 	return __ast_answer(chan, delay);
 }