Fix Python warning in overlay fonts generator Fixed: angleproject:358565474 Change-Id: Ide48691fa4d52d063c5c80fc7cdbc16c99a97ed0 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5953793 Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>