Add a minimum visible height and no ground tile parameter to DrawTileProc.

Filter out tile parts which are entirely outside the drawing area.

src/void_cmd.cpp

@@ -18,7 +18,7 @@
 
 #include "safeguards.h"
 
-static void DrawTile_Void(TileInfo *ti)
+static void DrawTile_Void(TileInfo *ti, DrawTileProcParams params)
 {
 	DrawGroundSprite(SPR_FLAT_BARE_LAND + SlopeToSpriteOffset(ti->tileh), PALETTE_ALL_BLACK);
 }