Fix build break on Windows

Change-Id: Iafaa666af19edcbfe72c35106f099c04fd4206d0
Reviewed-on: http://review.couchbase.org/43046
Reviewed-by: Pratap Chakravarthy <prataprc@couchbase.com>
Tested-by: Sriram Melkote <siri@couchbase.com>
Reviewed-by: Sriram Melkote <siri@couchbase.com>