(svn r11225) -Fix: if a sprite shares the bounding box of another sprite, the offset is unsigned instead of signed.

src/newgrf_house.cpp

@@ -346,7 +346,7 @@ void DrawTileLayout(const TileInfo *ti, const SpriteGroup *group, byte stage, Ho
 				HASBIT(_transparent_opt, TO_HOUSES)
 			);
 		} else {
-			AddChildSpriteScreen(image, pal, dtss->delta_x, dtss->delta_y, HASBIT(_transparent_opt, TO_HOUSES));
+			AddChildSpriteScreen(image, pal, (byte)dtss->delta_x, (byte)dtss->delta_y, HASBIT(_transparent_opt, TO_HOUSES));
 		}
 	}
 }

src/newgrf_industrytiles.cpp

@@ -196,7 +196,7 @@ void IndustryDrawTileLayout(const TileInfo *ti, const SpriteGroup *group, byte r
 				!HASBIT(image, SPRITE_MODIFIER_OPAQUE) && HASBIT(_transparent_opt, TO_INDUSTRIES)
 			);
 		} else {
-			AddChildSpriteScreen(image, pal, dtss->delta_x, dtss->delta_y, HASBIT(_transparent_opt, TO_INDUSTRIES));
+			AddChildSpriteScreen(image, pal, (byte)dtss->delta_x, (byte)dtss->delta_y, HASBIT(_transparent_opt, TO_INDUSTRIES));
 		}
 	}
 }