use legal FirstDirection as kDontCheck sentinel
UBSAN points out that -1 isn't required to be representable
in a FirstDirection, but I think the union of all possible
fields is.
In this case, the union is 3, oring together CW (0), CCW (1)
and Unknown (2). Since it's not one of the meaningful values
of the enum, it works as a nice sentinel.
Change-Id: Ib428a8f0d7f5edbf492501306604ba57e9d19e38
Reviewed-on: https://skia-review.googlesource.com/147002
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Yuqian Li <liyuqian@google.com>
1 file changed