change return type to void
change return type to void

apuckey/mongo-hhvm-driver,10gen-labs/mongo-hhvm-driver,10gen-labs/mongo-hhvm-driver,110035/mongo-hhvm-driver,txg168/mongo-hhvm-driver,110035/mongo-hhvm-driver,txg168/mongo-hhvm-driver,txg168/mongo-hhvm-driver,10gen-labs/mongo-hhvm-driver,mongodb-labs/mongo-hhvm-driver-unsupported,110035/mongo-hhvm-driver,110035/mongo-hhvm-driver,apuckey/mongo-hhvm-driver,apuckey/mongo-hhvm-driver,mongodb-labs/mongo-hhvm-driver-unsupported,apuckey/mongo-hhvm-driver,mongodb-labs/mongo-hhvm-driver-unsupported