Use fCurrGlyph as the looping variable.

This clarifies the code instead of keeping fCurrGlyph and
glyphIdx in sync.

Change-Id: I2746eac3c681d14a1cb0eb73b91de920b5e6fbbc
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/262151
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Herb Derby <herb@google.com>
1 file changed