Animate items emerging from building output ports

src/ui/GameWorldView.h

@@ -115,6 +115,7 @@ private:
     bool canAfford(BuildingType type) const;
 
     void drawTiles(QPainter& painter);
+    void drawEmergingItems(QPainter& painter);
     void drawBuildings(QPainter& painter);
     void drawSelectionHighlights(QPainter& painter);
     void drawCopyConfigFeedback(QPainter& painter);