Fix compile error with -Werror
Fix compile error with -Werror

Change-Id: Ifac2f0b1c06534bc85bad5fe2b2594c4eb208dda
Reviewed-on: http://review.couchbase.org/27387
Tested-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>
Reviewed-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>

avsej/libcouchbase,couchbase/libcouchbase,mnunberg/libcouchbase,avsej/libcouchbase,kojiromike/libcouchbase,avsej/libcouchbase,mnunberg/libcouchbase,avsej/libcouchbase,mody/libcouchbase,couchbase/libcouchbase,mnunberg/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,uvenum/libcouchbase,kojiromike/libcouchbase,avsej/libcouchbase,senthilkumaranb/libcouchbase,senthilkumaranb/libcouchbase,maxim-ky/libcouchbase,maxim-ky/libcouchbase,mody/libcouchbase,senthilkumaranb/libcouchbase,uvenum/libcouchbase,kojiromike/libcouchbase,avsej/libcouchbase,trondn/libcouchbase,couchbase/libcouchbase,maxim-ky/libcouchbase,uvenum/libcouchbase,maxim-ky/libcouchbase,mody/libcouchbase,PureSwift/libcouchbase,trondn/libcouchbase,PureSwift/libcouchbase,signmotion/libcouchbase,PureSwift/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,signmotion/libcouchbase,mnunberg/libcouchbase,trondn/libcouchbase,signmotion/libcouchbase,senthilkumaranb/libcouchbase,uvenum/libcouchbase,trondn/libcouchbase,mody/libcouchbase,kojiromike/libcouchbase,mnunberg/libcouchbase,PureSwift/libcouchbase,signmotion/libcouchbase,trondn/libcouchbase,uvenum/libcouchbase