From 47847a5a578a60e9ee03fa3f787975ee5f09965d Mon Sep 17 00:00:00 2001
From: James Turner <zakalawe@mac.com>
Date: Tue, 28 Aug 2018 23:34:55 +0100
Subject: [PATCH] Fix an assert in debug mode

---
 src/GUI/AircraftModel.cxx | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/src/GUI/AircraftModel.cxx b/src/GUI/AircraftModel.cxx
index b1a8443de..ad5c0130b 100644
--- a/src/GUI/AircraftModel.cxx
+++ b/src/GUI/AircraftModel.cxx
@@ -652,13 +652,15 @@ void AircraftItemModel::onScanAddedItems(int addedCount)
 
 void AircraftItemModel::onLocalCacheCleared()
 {
-    const int firstRow = 0;
-    const int lastRow = m_cachedLocalAircraftCount + 1;
+    if (m_cachedLocalAircraftCount > 0) {
+        const int firstRow = 0;
+        const int lastRow = m_cachedLocalAircraftCount - 1;
 
-    beginRemoveRows(QModelIndex(), firstRow, lastRow);
-    m_delegateStates.remove(0, m_cachedLocalAircraftCount);
-    m_cachedLocalAircraftCount = 0;
-    endRemoveRows();
+        beginRemoveRows(QModelIndex(), firstRow, lastRow);
+        m_delegateStates.remove(0, m_cachedLocalAircraftCount);
+        m_cachedLocalAircraftCount = 0;
+        endRemoveRows();
+    }
 }
 
 void AircraftItemModel::installFailed(QModelIndex index, simgear::pkg::Delegate::StatusCode reason)