RFR 8080486: JNI exception pending in jdk/src/java.base/windows/native/libnet/DualStackPlainSocketImpl.c

[Vyom Tewari]

Hi everyone,

Can you please review my changes for below bug.
Bug:
     JDK-8080486 : JNI exception pending in 
jdk/src/java.base/windows/native/libnet/DualStackPlainSocketImpl.c

Webrev:
http://cr.openjdk.java.net/~dfuchs/vyom/8080486/webrev.01

This change ensure that we immediately return if an exception has been 
raised (result == NULL) by GetMethodId/NewGlobalRef or proceed to the 
next statement if there is no JNI pending exception.

Thanks,
Vyom