Fix WavyPathText sample

Bug: skia:
Change-Id: Ic1c370a38a5004afc84cb99734595d350d12e935
Reviewed-on: https://skia-review.googlesource.com/20360
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
1 file changed