[Ohrrpgce] SVN: teeemcee/12807 frame_draw_transformed: shift vertices slightly to avoid artifacts

[subversion at HamsterRepublic.com]

teeemcee
2022-02-20 02:23:14 -0800 (Sun, 20 Feb 2022)
250
frame_draw_transformed: shift vertices slightly to avoid artifacts

Rounding errors during the calculation of the vertex positions will result in
almost vertical or horizontal quad edges which cut through a row/column of
pixels. Not a rasterizer bug.
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U   wip/allmodex.bas