fix fiddle example

TBR=caryclark@google.com

Bug: skia:6898
Change-Id: I7afde5c236fa087d623519b1a121bfbd3d70bd5e
Reviewed-on: https://skia-review.googlesource.com/114920
Reviewed-by: Cary Clark <caryclark@skia.org>
Commit-Queue: Cary Clark <caryclark@skia.org>
1 file changed