Qiet ASAN warnings about ieee float division

TBR=michaelludwig@google.com
Change-Id: I4f950060ea75203531f081f3b62e805cadc0adf5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/331484
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
1 file changed