Remove redundant nullchecks

[nneeoo]

We can use simple evidence to remove some null checks.
Code like this:

 if (null != n && "function" == typeof n.CompareTo) return n.CompareTo(t);

Could be simplified into this, with null check completely removed.

 if ("function" == typeof n.CompareTo) return n.CompareTo(t);

[alexlamsl]

The check is not redundant − at least not in Firefox:

var n = null;
typeof n.CompareTo

Uncaught TypeError: n is null