fixed Metal code generation for recursive functions

Bug: oss-fuzz:14096
Change-Id: I9a7586e4000d1398be131ee4a2b85812b14096f3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209381
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
1 file changed