fixed crash in commit/rollback
fixed crash in commit/rollback

MattKunze/node-oracle,highflying/node-oracle,highflying/node-oracle,highflying/node-oracle,joeferner/node-oracle,devspinn/node-oracle,devspinn/node-oracle,joeferner/node-oracle,joeferner/node-oracle,devspinn/node-oracle,MattKunze/node-oracle,joeferner/node-oracle,MattKunze/node-oracle,MattKunze/node-oracle,devspinn/node-oracle,highflying/node-oracle