OSV-2020-1047 UNKNOWN READ in arrow::ipc::internal::FieldFromFlatbuffer

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20123 Crash type: UNKNOWN READ Crash state: arrow::ipc::internal::FieldFromFlatbuffer arrow::ipc::internal::FieldFromFlatbuffer arrow::ipc::internal::GetSchema...