fixed an assertion error with unspecified sksl array sizes

Bug: oss-fuzz:15329
Change-Id: I994e58e794e4c0ee97a59ff83f295dc981ba5dba
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/240276
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
1 file changed