RFR: JDK-8036134 - Check src/windows/native/sun/nio/fs/WindowsNativeDispatcher.c for JNI pending exceptions

[Mark Sheppard]

Hi
    Please oblige and review the following changes
http://cr.openjdk.java.net/~msheppar/8036134/webrev/

which address the issues raised in
https://bugs.openjdk.java.net/browse/JDK-8036134

summary:
modification to logic flow to handle JNI pending exception

regards
Mark