OSV-2018-54 UNKNOWN READ in BEInt<short, 2>::operator short

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=11305 Crash type: UNKNOWN READ Crash state: BEInt::operator short AAT::KerxSubTableFormat1::drivercontextt::transition void AAT::StateTableDriver::EntryDat...