[7u14] Request for approval for CR 8004298: NPE in WindowsTreeUI.ensureRowsAreVisible

[Alexander Scherbatiy]

Hello,

This is a request to backport a JDK 8 fix into JDK 7u14:

8004298: NPE in WindowsTreeUI.ensureRowsAreVisible
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8004298

The fix has already been pushed to JDK 8, as:
http://hg.openjdk.java.net/jdk8/awt/jdk/rev/f55d869052dd

The code changes for JDK 7u14 are identical to the ones in JDK 8.

Thank you,
  Alexandr.