From aa0effb4cb38f4c3a06564bd9e6a0ee516d4f958 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed, 22 Oct 2014 12:18:31 -0400
Subject: [PATCH] ignore negative value locates and MMC locate commands

---
 libs/ardour/session_transport.cc | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libs/ardour/session_transport.cc b/libs/ardour/session_transport.cc
index 3e853a5005..6954bd0288 100644
--- a/libs/ardour/session_transport.cc
+++ b/libs/ardour/session_transport.cc
@@ -865,6 +865,11 @@ Session::flush_all_inserts ()
 void
 Session::start_locate (framepos_t target_frame, bool with_roll, bool with_flush, bool with_loop, bool force)
 {
+	if (target_frame < 0) {
+		error << _("Locate called for negative sample position - ignored") << endmsg;
+		return;
+	}
+
 	if (synced_to_engine()) {
 
 		double sp;
@@ -1747,6 +1752,10 @@ Session::maybe_stop (framepos_t limit)
 void
 Session::send_mmc_locate (framepos_t t)
 {
+	if (t < 0) {
+		return;
+	}
+
 	if (!_engine.freewheeling()) {
 		Timecode::Time time;
 		timecode_time_subframes (t, time);