Fix crash in nanobench IsFinite benchmark.

Some benchmarks were removed here:
https://skia-review.googlesource.com/c/skia/+/842476/12/bench/MathBench.cpp

But elsewhere in the code, we had a baked-in assumption about the
number of elements in this array. This is causing some errors on
the tree.

Change-Id: Ieb5c7377c83519ba634cb04552d03401cc0763a7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/842505
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
1 file changed