Error: cannot read property type from null

[bobliwang]

In version 1.3.0, seamless.child.js, it throws error when it receives a post message with data property null. JSON.parse(e.data) returns null value and assigns to msg, afterwards if(!msg.type) blows out with null object error. Line 215

[yabdab]

I fixed it by adding this just after __dispatch: function(e) {_

if(!e.data) return;