Falling tile placed above wall can be visible during falling

[TCH68k]

Steps to reproduce:

1. Put a falling tile above a wall.
2. Cause it fall without you.
3. It will be drawn over the wall.

I am not sure if the cause is number two, or not, but standing on the top of it did not cause this glitch, while moving from it did.

Illustration video: http://oscomp.hu/depot/sdlpop_falling_tile_visible_through_wall.mkv

Note: The same happens in the original game, but i still think, this should be fixed.