Review Request -- 5045147 : When TreeMap is empty explicitly check for null keys in put() [updated]

[Mike Duigou]

I've gotten feedback regarding this issue and I've updated the webrev to use the commented out compare(key, key) test rather than the previously committed solution. I hadn't looked at the commented out code too carefully and had assumed it was pseudo-code rather than an actual solution. It's an improvement over the original solution and reads, to me and apparently others, a lot simpler.

http://cr.openjdk.java.net/~mduigou/5045147/1/webrev/

Also now included is a jtreg unit test.

Mike