rpc-test-base.h: squelch a warning

Change-Id: I4ae8ebb0cb49e32f08f5c3f0c0f5061b029e0638
Reviewed-on: http://gerrit.cloudera.org:8080/15079
Tested-by: Kudu Jenkins
Reviewed-by: Alexey Serbin <aserbin@cloudera.com>
Reviewed-by: Andrew Wong <awong@cloudera.com>
1 file changed