"Special" hull color bugs about avara

[rherriman]

I managed to fix the issues I reported above, but it was at the expense of the head color replacement. I now believe CBSPPart::ReplaceColor may not working as intended. We usually see it written as ReplaceColor(kMarkerColor, ...) which suggests that it is meant to replace the color for any polygon that is or was originally set to kMarkerColor. Right now, ReplaceColor is naïve and only applies to polygons that currently match the first parameter.

[rherriman]

I have since confirmed that CBSPPart::ReplaceColor is meant to behave in the way I described above by examining the original source. I intend on fixing the implementation myself, which I anticipate will resolve #3 as well as other small issues not formally catalogued at the moment.

[rherriman]

The problem persists even after #14, the issue being that CWalkerActor removes, replaces, and modifies the hull head color after SetSpecialColor is called. Need to either change the way special colors are implemented (and possibly alter the API just introduced in #14) or figure out how to fix CWalkerActor (and determine why it is doing what it is doing in the first place).