fogus/lemonad — pull request #3 by andreaslundahl (2013-04-11 10:16:32+00:00)
Title: Allow L.snapshot to take non-existy values

`null` and `undefined` do not allow property reads (e.g. `null.foo`). So
without the existy check `L.snapshot(null)` and `L.snapshot(undefined)`
throw TypeErrors.