Fix assertion when removing all elements from model

plugins/channelrx/demodadsb/adsbdemodgui.h

@@ -378,7 +378,9 @@ public:
     }
 
     void removeAllAirports() {
-        beginRemoveRows(QModelIndex(), 0, m_airports.count());
+        if (m_airports.count() > 0)
+        {
+            beginRemoveRows(QModelIndex(), 0, m_airports.count() - 1);
             m_airports.clear();
             m_airportDataFreq.clear();
             m_airportDataFreqRows.clear();
@@ -387,6 +389,7 @@ public:
             m_elevation.clear();
             endRemoveRows();
         }
+    }
 
     int rowCount(const QModelIndex &parent = QModelIndex()) const override {
         Q_UNUSED(parent)

plugins/channelrx/demodvor/vordemodgui.h

@@ -143,13 +143,16 @@ public:
     }
 
     void removeAllVORs() {
-        beginRemoveRows(QModelIndex(), 0, m_vors.count());
+        if (m_vors.count() > 0)
+        {
+            beginRemoveRows(QModelIndex(), 0, m_vors.count() - 1);
             m_vors.clear();
             m_selected.clear();
             m_radials.clear();
             m_vorGUIs.clear();
             endRemoveRows();
         }
+    }
 
     QHash<int, QByteArray> roleNames() const {
         QHash<int, QByteArray> roles;

plugins/feature/map/mapgui.h

@@ -350,12 +350,15 @@ public:
     }
 
     void removeAll()
+    {
+        if (m_items.count() > 0)
         {
             beginRemoveRows(QModelIndex(), 0, m_items.count());
             m_items.clear();
             m_selected.clear();
             endRemoveRows();
         }
+    }
 
     void setDisplayNames(bool displayNames)
     {

plugins/feature/vorlocalizer/vorlocalizergui.h

@@ -144,13 +144,16 @@ public:
     }
 
     void removeAllVORs() {
-        beginRemoveRows(QModelIndex(), 0, m_vors.count());
+        if (m_vors.count() > 0)
+        {
+            beginRemoveRows(QModelIndex(), 0, m_vors.count() - 1);
             m_vors.clear();
             m_selected.clear();
             m_radials.clear();
             m_vorGUIs.clear();
             endRemoveRows();
         }
+    }
 
     QHash<int, QByteArray> roleNames() const {
         QHash<int, QByteArray> roles;