From e121b4b548598ea16976980c0fc4af4dcd948b07 Mon Sep 17 00:00:00 2001
From: Dirk Hohndel <dirk@hohndel.org>
Date: Wed, 11 Mar 2015 11:23:50 -0700
Subject: [PATCH] Make sure no gas changes with negative time can be added

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
---
 qt-ui/profile/profilewidget2.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/qt-ui/profile/profilewidget2.cpp b/qt-ui/profile/profilewidget2.cpp
index 66ef84ac4..36b9c6468 100644
--- a/qt-ui/profile/profilewidget2.cpp
+++ b/qt-ui/profile/profilewidget2.cpp
@@ -1391,6 +1391,9 @@ void ProfileWidget2::changeGas()
 	struct gasmix gasmix;
 	int seconds = timeAxis->valueAt(scenePos);
 
+	// no gas changes before the dive starts
+	seconds = seconds > 0 ?: 0;
+
 	if (seconds == 0) {
 		bool eventRemoved = false;
 		struct event *gasChangeEvent = current_dc->events;