NPE in SubstanceInternalFrameTitlePane.setActive(...)

[Stephane-D]

It was already the case in 7.1 and still present in 7.2.

We can have a NPE when we use the JInternalFrame.setSelected(..) method before the frame is actually visible (not really sure but i can make it easily happen) because the RootPane is not yet defined. I fixed the problem by changing this

void setActive(boolean isActive) {
    this.getRootPane().repaint();
}

by

void setActive(boolean isActive) {
    repaint();
}

I think the SubstanceTitlePane is also impacted by the problem.

[Stephane-D]

Thanks for fixing that issue :)