stickiness: avoid using unsafe (#2023)
stickiness: avoid using unsafe (#2023)

App Engine doesn't allow use of unsafe.
stanley-cheung/grpc-go,thinkerou/grpc-go,menghanl/grpc-go,thinkerou/grpc-go,stanley-cheung/grpc-go,menghanl/grpc-go,MakMukhi/grpc-go,grpc/grpc-go,improbable-io/grpc-go,grpc/grpc-go,MakMukhi/grpc-go,dfawley/grpc-go,improbable-io/grpc-go,dfawley/grpc-go