Wrong calculations for uniform scale paint tables (21 — 23)

[underware]

Currently, we are getting incorrect calculations for uniform scales (and probably non-uniform scales) in samsa-core 2.

Changing line 3335 from:
if (paint.format >= 20) paint.scale.push(operands[o++]/0x4000); // scaleY
to:
if (paint.format <= 20) paint.scale.push(operands[o++]/0x4000); // scaleY

fixed the issue for us.