MB-13794 Initialize dirname_len to 0 before strcpy()
MB-13794 Initialize dirname_len to 0 before strcpy()

Change-Id: Ib4d3aa838100fdd6fee8fff1bca35acabdb70ba0

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