From 0a6875df3bb6c35cac2ea42fcbb729e2e0e68c5f Mon Sep 17 00:00:00 2001
From: Mark Liversedge <liversedge@gmail.com>
Date: Sat, 14 Jan 2012 15:34:42 +0000
Subject: [PATCH] Fix Crash on no ErgFile selected

Fixes #600.
---
 src/TrainTool.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/TrainTool.cpp b/src/TrainTool.cpp
index 05828df1e..a22d2e7a5 100644
--- a/src/TrainTool.cpp
+++ b/src/TrainTool.cpp
@@ -994,10 +994,13 @@ void TrainTool::guiUpdate()           // refreshes the telemetry
             rtData.setMsecs(total_msecs);
             rtData.setLapMsecs(lap_msecs);
 
-            long lapTimeRemaining = ergFile->nextLap(load_msecs) - load_msecs;
+            long lapTimeRemaining;
+            if (ergFile) lapTimeRemaining = ergFile->nextLap(load_msecs) - load_msecs;
+            else lapTimeRemaining = 0;
+
             if(lapTimeRemaining < 0)
             {
-                lapTimeRemaining =  ergFile->Duration - load_msecs;
+                if (ergFile) lapTimeRemaining =  ergFile->Duration - load_msecs;
                 if(lapTimeRemaining < 0)
                     lapTimeRemaining = 0;
             }