cancelling a root vault causes owner == 0 [?]

[adria0]

Since parentVaultController is 0 in root vault, he ower is changed to 0.
( btw, maybe we need to use Owned.changeOwner ?? )

    function cancelVault() onlyOwnerOrParent returns (bool _finished) {
      ...
    owner = parentVaultController;

Is setting owner == 0 an usual behavior?

[GriffGreen]

wow! Nice catch, it is usual behavior if you want to decentralize your vault... the owner can be set to 0.... but for cancelling the vault, that may not be what we want.