bug 137327, r=caillon@returnzero.com,a=shaver translate null to -1 in getParentIndex return, to avoid infinite loop git-svn-id: svn://10.0.0.236/trunk@120753 18797224-902f-48f8-a5cc-f745e15eee43
bug 137327, r=caillon@returnzero.com,a=shaver translate null to -1 in getParentIndex return, to avoid infinite loop git-svn-id: svn://10.0.0.236/trunk@120753 18797224-902f-48f8-a5cc-f745e15eee43