pillowfight: Fix compiler warning %u is unsigned
pillowfight: Fix compiler warning %u is unsigned

Change-Id: Ia4dc7acd3996f67c49e0269b5144ab2c7a31126f
Reviewed-on: http://review.couchbase.org/63477
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>

kojiromike/libcouchbase,avsej/libcouchbase,mody/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,mody/libcouchbase,avsej/libcouchbase,avsej/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,avsej/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,mody/libcouchbase,avsej/libcouchbase,kojiromike/libcouchbase,mody/libcouchbase,kojiromike/libcouchbase,couchbase/libcouchbase,kojiromike/libcouchbase,couchbase/libcouchbase