check for land index not -1, fix warning

Signed-off-by: Sam Hellawell <sshellawell@gmail.com>

apps/opencs/model/world/regionmap.cpp

@@ -29,9 +29,11 @@ namespace CSMWorld
     {
         const IdCollection<Land>& lands = data.getLand();
         int landIndex = lands.searchId(cell.mId);
-        const Land& land = lands.getRecord(landIndex).get();
+        if (landIndex == -1)
+            return 0.0f;
 
         // If any part of land is above water, returns > 0 - otherwise returns < 0
+        const Land& land = lands.getRecord(landIndex).get();
         if (land.getLandData())
             return land.getLandData()->mMaxHeight - cell.mWater;
 

apps/opencs/view/world/regionmap.cpp

@@ -364,7 +364,6 @@ std::vector<CSMWorld::UniversalId> CSVWorld::RegionMap::getDraggedRecords() cons
 
 void CSVWorld::RegionMap::dragMoveEvent(QDragMoveEvent* event)
 {
-    QModelIndex index = indexAt(event->pos());
     const CSMWorld::TableMimeData* mime = dynamic_cast<const CSMWorld::TableMimeData*>(event->mimeData());
     if (mime != nullptr && (mime->holdsType(CSMWorld::UniversalId::Type_Region)))
     {