Fixes Redis saving when expiration is null
Fixes Redis saving when expiration is null
csburton/Stash,localheinz/Stash,bankiru/Stash,graphis/Stash,csburton/Stash,andrerom/Stash,jaredtking/Stash,alawnchen/Stash,localheinz/Stash,jaredtking/Stash,tedious/Stash,theUniC/Stash,graphis/Stash,AndrewCarterUK/Stash,AndrewCarterUK/Stash,tedious/Stash,alawnchen/Stash,bankiru/Stash,andrerom/Stash,theUniC/Stash