Fix some innocuous compiler warnings.
Fix some innocuous compiler warnings.

rickypai/zookeeper,rickypai/zookeeper,zk-ruby/zookeeper,songling88/zookeeper,songling88/zookeeper,songling88/zookeeper,zk-ruby/zookeeper,rickypai/zookeeper,zk-ruby/zookeeper,songling88/zookeeper,rickypai/zookeeper