From a65de46f0a2521bdf1118987fe85a737bbb45a89 Mon Sep 17 00:00:00 2001
From: Don Gagne <don@thegagnes.com>
Date: Wed, 16 May 2018 10:08:12 -0700
Subject: [PATCH] Fix crash when empty

---
 src/FactSystem/FactValueSliderListModel.cc | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/FactSystem/FactValueSliderListModel.cc b/src/FactSystem/FactValueSliderListModel.cc
index 59adb5fd2..efda324fd 100644
--- a/src/FactSystem/FactValueSliderListModel.cc
+++ b/src/FactSystem/FactValueSliderListModel.cc
@@ -38,10 +38,12 @@ FactValueSliderListModel::~FactValueSliderListModel()
 
 int FactValueSliderListModel::resetInitialValue(void)
 {
-    // Remove any old rows
-    beginRemoveRows(QModelIndex(), 0, _cValues - 1);
-    _cValues = 0;
-    endRemoveRows();
+    if (_cValues > 0) {
+        // Remove any old rows
+        beginRemoveRows(QModelIndex(), 0, _cValues - 1);
+        _cValues = 0;
+        endRemoveRows();
+    }
 
     _initialValue = _fact.cookedValue().toDouble();
     _initialValueRounded = qRound(_initialValue);
-- 
2.22.0