r5370 /src/mame/video/snes.c: SNES: Fixed rowscroll line bug in many gamesbefore (
Dead Dance (J)):
after:
Oh, the PAL SNES doesn't catch that it must run at 240 vertical resolution...
the +1 is only hackish in that a proper fix is probably to special case line 0 to update the y value and "process sprites".
Ah, ok, so it's not THAT hackish then, just inaccurate