fixed type error in RTAdjust application

Bug: skia:
Change-Id: I94ba5853812659920bba781ae983fc9fbb647f9c
Reviewed-on: https://skia-review.googlesource.com/95082
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
2 files changed