Revert "Commenting retErr and setErr in Decode"
Revert "Commenting retErr and setErr in Decode"

This reverts commit c7a729999d0c3e51964bd30c05547fac82f6527d.

Gorilla/securecookie,s7v7nislands/securecookie,abduelhamit/securecookie,elithrar/securecookie,jmptrader/securecookie,gorilla/securecookie