fixed a vec2 -> float2 that got missed

Bug: skia:
Change-Id: I51ae880ba0949d0c71331be6ce0ff13411169191
Reviewed-on: https://skia-review.googlesource.com/28122
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
1 file changed