Add missing RenderFill function for brushes

src/game/Brush.h

@@ -106,6 +106,10 @@ public:
 			return;
 		g->xor_bitmap(outline, position.X-radius.X, position.Y-radius.Y, size.X, size.Y);
 	}
+	virtual void RenderFill(Graphics * g, ui::Point position)
+	{
+		//Do nothing for now - possibly draw some sort of flood fill mask
+	}
 	virtual void GenerateBitmap()
 	{
 		if(bitmap)

src/game/GameView.cpp

@@ -1068,6 +1068,10 @@ void GameView::OnDraw()
 				}
 				activeBrush->RenderLine(g, c->PointTranslate(drawPoint1), finalCurrentMouse);
 			}
+			else if(drawMode==DrawFill)
+			{
+				activeBrush->RenderFill(g, finalCurrentMouse);
+			}
 			else
 			{
 				activeBrush->RenderPoint(g, finalCurrentMouse);