Fix ValidUntil check in lib/filegen package.
Fix ValidUntil check in lib/filegen package.

rgooch/Dominator,keep94/Dominator,rgooch/Dominator,Symantec/Dominator,Symantec/Dominator,Symantec/Dominator,keep94/Dominator,keep94/Dominator,rgooch/Dominator