Very slightly loosen some asserts by adding FLT_MIN tolerance #81
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Found an example with fuzz-testing where this assertion failed with extremely small values. For example, the first assert failed with:
orgUp->t: -0x1.ffep-138 dstUp->t: 0x0p+0 isect.t: -0x1p-137(values in hex float)
So that's with
isect.tan extremely close-to-zero negative value,dstUp->tas exactly 0, butorgUp->tas just a hair smaller.