Don't make the arraysize() macro cast to int.

Change-Id: I4c2d1d1d43b100ff5f6d1f58b03d5b0a1f22baa7
Reviewed-on: https://code-review.googlesource.com/c/re2/+/43030
Reviewed-by: Paul Wankadia <junyer@google.com>
17 files changed