Bangladesh's state grains buyer has issued another international tender to purchase 50,000 metric tons of rice, European traders said on Tuesday.The deadline for price offers is December 22.The Bangladesh government has issued a series of rice tenders to improve local supplies in response to rising domestic rice prices.Bangladesh also issued a separate tender seeking 50,000 tons of rice, with price offers to be submitted on December 15 while offers in another rice tender from Bangladesh for 50…