RFR: 8041602 - (prefs) Check jdk/src/windows/native/java/util/WindowsPreference.c for JNI pending exceptions

[Mark Sheppard]

Hi,
    please oblige and review the following change
http://cr.openjdk.java.net/~msheppar/8041602/webrev/

which addresses the issue
https://bugs.openjdk.java.net/browse/JDK-8041602

which is a backport of
https://bugs.openjdk.java.net/browse/JDK-8035340

the original changeset didn't apply cleanly and was applied manually
http://hg.openjdk.java.net/jdk9/dev/jdk/rev/740ffd98e35a

regression tests ran ok

and finally please approve backport to jdk8u-dev

regards
Mark