oxcfold: Fix stupid crash EcDoRpc_RopGetContentsTable

And this time, implement handle clean up properly

This reverts also a28d0add2698cbd4beb13f518e11aad2478317f7
oxcfold: enhance error checking in RopGetContentsTable() implementation
Merge pull request #74 from openchange/kamenim/contents-table-crash-fix

RopGetContentsTable crash fix