Fix: support empty modules in EFT format.
Fix: support empty modules in EFT format.

wffurr/osmium,osmium-org/osmium,wffurr/osmium,copyliu/osmium,wffurr/osmium,wffurr/osmium,copyliu/osmium,osmium-org/osmium,copyliu/osmium,osmium-org/osmium,osmium-org/osmium