RFR (XS) [9] PlainDatagramSocketImpl missing returns after “throwing an exception”

[Chris Hegarty]

Some very minor clean up in PlainDatagramSocketImpl to add some missing returns after “throwing an exception”, as well as checking for a pending exception after calling setTTL ( that can throw ).

http://cr.openjdk.java.net/~chegar/nativeInetCleanup/webrev.02/webrev/src/solaris/native/java/net/PlainDatagramSocketImpl.c.sdiff.html

-Chris.

P.S. This is not a comprehensive audit of this file, just some issues I noticed while refactoring some of he InetAddress fieldIDs yesterday.