I recently purchased a bottle of Chivas Regal Royal 21 Salute. Upon attempting to open it the cork broke in half, with half still stuck in the bottle. Although the remaining cork appears to still have maintained a seal, I am concerned that the bad cork may have allowed the whiskey to spoil. Before I serve it to friends, I was hoping someone would have some answers to my questions. Is it likely spoiled or likely still okay? What are the reasonable concerns I should have? Does whiskey get 'corked' like wine?