Correct the writing errors in discardStatement().

Bug: b/0
Change-Id: I8811e1c8f82196de1fe70cefb3e683e8bc6fbc93
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1009537
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Thomas Smith <thomsmit@google.com>
1 file changed