ATHENS (Reuters) - The European Central Bank will not allow Greek lenders to collapse as this would create a domino effect and topple banks in other parts of Europe, a Greek state minister said on Saturday. As Greece moves perilously close to default and a possible exit from the euro zone, the ECB expanded emergency funding to keep Greek banks afloat, as nervous savers withdrew billions of euros from local lenders in recent days. "The ECB cannot let banks collapse," State Minister Alekos Flabouraris told Greek Mega television. ...