[rfc][icedtea-web][policyeditor] Parent-window searching fix

[Omair Majid]

* Andrew Azores <aazores at redhat.com> [2014-06-24 15:13]:
> If the Javadoc on this method is to be trusted then the semantics are
> identical, and it seems to work fine anyway.

Use the source :)

It looks exactly the same.

> -                            if (c == null) {
> -                                return;
> -                            }

> +                        final Window w = SwingUtilities.getWindowAncestor(PolicyEditor.this);

Just one nit: if the parent is null, the previous code returned without
doing anything. getWindowAncestor can also return null, which we should
handle identically.

Thanks,
Omair

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