fix memory leak. on the way to Valhalla
fix memory leak. on the way to Valhalla

actsasflinn/ruby-tokyotyrant,cheapRoc/ruby-tokyotyrant,cheapRoc/ruby-tokyotyrant,actsasflinn/ruby-tokyotyrant,cheapRoc/ruby-tokyotyrant,actsasflinn/ruby-tokyotyrant