ZOOKEEPER-4654: Fix C client test compilation error in Util.cc.
Author: Chris Nauroth <cnauroth@apache.org>
Reviewers: Enrico Olivelli <eolivelli@apache.org>, Mate Szalay-Beko <symat@apache.org>
Closes #1967 from cnauroth/ZOOKEEPER-4654
(cherry picked from commit 9a43bc95aa8c95808d585b7aafb375a1e438a581)
Signed-off-by: Mate Szalay-Beko <symat@apache.org>