[GRAPHICS] Scrap Nuts and Bolts should not use HAR palette indexes

[Nopey]

OMF 2097 has some method of picking what palette to draw Scrap Nuts and Bolts with-- it never uses the HAR colors directly to draw them. This prevents har palette transformations such as being fried by Pyros or lit by the Stadium Lighting from effecting the scrap nuts and bolts.

I'd like to find where this behavior is implemented in MASTER.DAT before attempting to recrate this feature, hence why this is an issue and not a PR.

Screenshots

Here is an unmodified indexed screenshot of OMF 2097 running in dosbox-x:

Here is the same screenshot, but with a random debug palette I had laying around applied. Notice how the HAR colors (which are all purple in my debug palette) are not present on any of the scrap nuts and bolts?