lmu2png: fix bad offset on right-edge of terrain autotiles

[scurest]

This is a fix for lmu2png. The right edge of terrain autotiles are drawn wrong on one-tile-wide vertical strips.

Before/after this patch:

This right half of the tile is drawn by this line

Tools/lmu2png/src/chipset.cpp

Line 290 in 0772ab7

DrawTall(dest, x+HALF_TILE, y, sX+32, sY+32);

Note that this draws the left half of the chip into the right half of the destination.

I don't understand any of the Combination stuff, but I don't think that should ever happen, so I'm guessing this is a typo and it should be drawing the right half of the chip instead ie. the offset needs to move right 8 pixels.

[carstene1ns]

Good find.

jenkins: ok to test

[Ghabry]

Thanks and 👍 for the detailed PR description.

You are probably right that this is a typo. In all other cases where x+HALF_TILE, y, sX is involved it is always +40.

The one you changed was the only outlier.