[7u4] Request for approval for 6505523 - NullPointerException in BasicTreeUI when a node is removed by expansion listener

[Alexander Scherbatiy]

Hello,

This is a request to backport a JDK 8 fix into JDK 7u4:

6505523 NullPointerException in BasicTreeUI when a node is removed by 
expansion listener
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6505523

The fix has already been pushed to JDK 8, as:
http://hg.openjdk.java.net/jdk8/awt/jdk/rev/79d14e328670


The code changes for jdk7u4 are identical to the ones in jdk8.

Thank you,
  Alexandr.