[14] Review Request: 8235739 Rare NPE at WComponentPeer.getGraphics()

[Sergey Bylokhov]

Hello.
Please review the fix for JDK 14.

Bug: https://bugs.openjdk.java.net/browse/JDK-8235739
Fix: http://cr.openjdk.java.net/~serb/8235739/webrev.00

In the WComponentPeer.getGraphics() we may get NPE because
AWTAccessor....getPeer("window") can return null if the "window"
was disposed already and its peer was set to null.

--
Best regards, Sergey.