DataTables/ColReorder — pull request #10 by DiogoDoreto (2013-07-23 16:32:30+00:00)
Title: Fix destroy and initialize problem

When destroying, the `_oPluginColReorder ` prop is set to `null` but the check on init is only for `undefined`, which causes ColReorder to think that it's already initialized.

Comparing to `null` with type coercion will check for both `null` and `undefined`.