Add missing file close statement
Add missing file close statement

jsenellart-systran/OpenNMT,OpenNMT/OpenNMT,jsenellart/OpenNMT,monsieurzhang/OpenNMT,jsenellart-systran/OpenNMT,jsenellart/OpenNMT,OpenNMT/OpenNMT,monsieurzhang/OpenNMT,da03/OpenNMT,OpenNMT/OpenNMT,jsenellart/OpenNMT,monsieurzhang/OpenNMT,jungikim/OpenNMT,jsenellart-systran/OpenNMT,jungikim/OpenNMT,jungikim/OpenNMT,da03/OpenNMT,da03/OpenNMT