Fix 0.digits = [0] in strict mode
Fix 0.digits = [0] in strict mode

The problem being that in strict mode boxed 0 is !== from 0.

opal/opal,Mogztter/opal,opal/opal,Mogztter/opal,Mogztter/opal,opal/opal,opal/opal,Mogztter/opal