[clang][NFC] Follow up to ArraySizeModifier refactoring

This addresses issues found by https://lab.llvm.org/buildbot/#/builders/68/builds/62599 introduced in d71ac4b05bcf2804368ec7217a13c2c47fce7479

GitOrigin-RevId: f5f4c5b313fc809b9b1b9d600d0ec3cec0d12941
1 file changed