Bug #4900: Fix the non-fogcoord fog test on r100 (and rv200) at tcl_mode=1 by flipping the signs on two factors.  While this contradicts the DDK, it matches what r200 does, and it fixes the test.
Bug #4900: Fix the non-fogcoord fog test on r100 (and rv200) at tcl_mode=1 by
flipping the signs on two factors.  While this contradicts the DDK, it matches
what r200 does, and it fixes the test.

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