--- a/src/viewport.h	Fri Sep 14 21:36:59 2007 +0000
+++ b/src/viewport.h	Fri Sep 14 21:54:57 2007 +0000
@@ -48,7 +48,7 @@
 
 void DrawGroundSprite(SpriteID image, SpriteID pal);
 void DrawGroundSpriteAt(SpriteID image, SpriteID pal, int32 x, int32 y, byte z);
-void AddSortableSpriteToDraw(SpriteID image, SpriteID pal, int x, int y, int w, int h, byte dz, byte z, bool transparent = false);
+void AddSortableSpriteToDraw(SpriteID image, SpriteID pal, int x, int y, int w, int h, int dz, int z, bool transparent = false, int bb_offset_x = 0, int bb_offset_y = 0, int bb_offset_z = 0);
 void *AddStringToDraw(int x, int y, StringID string, uint64 params_1, uint64 params_2);
 void AddChildSpriteScreen(SpriteID image, SpriteID pal, int x, int y);