Fix compiler warning: uninitialized variable in kv_instance
Fix compiler warning: uninitialized variable in kv_instance

Change-Id: I75364cd709a715f8ed2be128ee6ac964867f837f

hisundar/forestdb,hisundar/forestdb,nvoron23/forestdb,joliss/forestdb,yyangpan/forestdb,nvoron23/forestdb,joliss/forestdb,seem-sky/forestdb,seem-sky/forestdb,sushmaad/forestdb,yyangpan/forestdb,jinxuan/forestdb,wurikiji/forestdb,zhaog/forestdb,sushmaad/forestdb,couchbase/forestdb,zhaog/forestdb,couchbase/forestdb,jinxuan/forestdb,wurikiji/forestdb