RFR: JDK-8035631 - JNI exception pending in jdk/src/windows/native/java/net/NetworkInterface_winXP.c

[Mark Sheppard]

Hi

   Please oblige and review the following changes
http://cr.openjdk.java.net/~msheppar/8035631/webrev/

which address the issues raised in
https://bugs.openjdk.java.net/browse/JDK-8035631

Summary:
added CHECK_NULL_RETURN after JNI calls

regards
Mark