Address more leaks detected in _fdb_open
Address more leaks detected in _fdb_open

20:23:45 Direct leak of 16 byte(s) in 1 object(s) allocated from:
20:23:45     #0 0x4cd2b2 in __interceptor_malloc (/home/couchbase/jenkins/workspace/forestdb-addresssanitizer-master/build/forestdb/tests/functional/multi_kv_functional_test+0x4cd2b2)
20:23:45     #1 0x569cac in fdb_fetch_header /home/couchbase/jenkins/workspace/forestdb-addresssanitizer-master/forestdb/src/forestdb.cc:249:34
20:23:45     #2 0x56c40a in _fdb_open /home/couchbase/jenkins/workspace/forestdb-addresssanitizer-master/forestdb/src/forestdb.cc:1737:13
20:23:45     #3 0x56ab63 in fdb_open /home/couchbase/jenkins/workspace/forestdb-addresssanitizer-master/forestdb/src/forestdb.cc:815:10
20:23:45     #4 0x4f0fb1 in multi_kv_test(unsigned char, unsigned long) /home/couchbase/jenkins/workspace/forestdb-addresssanitizer-master/forestdb/tests/functional/multi_kv_functional_test.cc:442:13
20:23:45     #5 0x50d708 in main /home/couchbase/jenkins/workspace/forestdb-addresssanitizer-master/forestdb/tests/functional/multi_kv_functional_test.cc:2527:13
20:23:45     #6 0x2b56e2ff976c in __libc_start_main /build/buildd/eglibc-2.15/csu/libc-start.c:226

Change-Id: If73b737c4bc4e480b40738a2c997b61ab7313ad8
Reviewed-on: http://review.couchbase.org/65753
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Chiyoung Seo <fcffc23db27b19ee4ebba46695ee6b50e09216a2@couchbase.com>

wurikiji/forestdb,wurikiji/forestdb,hisundar/forestdb,couchbase/forestdb,hisundar/forestdb,couchbase/forestdb