Fix trade windows crashing after a new game

apps/openmw/mwgui/container.cpp

@@ -220,11 +220,13 @@ namespace MWGui
 
         mDisposeCorpseButton->setVisible(loot);
 
-        setTitle(MWWorld::Class::get(container).getName(container));
-
         mSortModel = new SortFilterItemModel(mModel);
 
         mItemView->setModel (mSortModel);
+
+        // Careful here. setTitle may cause size updates, causing itemview redraw, so make sure to do it last
+        // or we end up using a possibly invalid model.
+        setTitle(MWWorld::Class::get(container).getName(container));
     }
 
     void ContainerWindow::onCloseButtonClicked(MyGUI::Widget* _sender)

apps/openmw/mwgui/tradewindow.cpp

@@ -82,7 +82,6 @@ namespace MWGui
     void TradeWindow::startTrade(const MWWorld::Ptr& actor)
     {
         mPtr = actor;
-        setTitle(MWWorld::Class::get(actor).getName(actor));
 
         mCurrentBalance = 0;
         mCurrentMerchantOffer = 0;
@@ -99,6 +98,10 @@ namespace MWGui
         mItemView->setModel (mSortModel);
 
         updateLabels();
+
+        // Careful here. setTitle may cause size updates, causing itemview redraw, so make sure to do it last
+        // or we end up using a possibly invalid model.
+        setTitle(MWWorld::Class::get(actor).getName(actor));
     }
 
     void TradeWindow::onFilterChanged(MyGUI::Widget* _sender)