7107020: java.net.PlainSocketImpl.socketSetOption() calls itself

Reviewed-by: alanb, chegar
diff --git a/jdk/src/windows/classes/java/net/PlainSocketImpl.java b/jdk/src/windows/classes/java/net/PlainSocketImpl.java
index ea11fa6..bcb01f1 100644
--- a/jdk/src/windows/classes/java/net/PlainSocketImpl.java
+++ b/jdk/src/windows/classes/java/net/PlainSocketImpl.java
@@ -314,7 +314,7 @@
 
     void socketSetOption(int cmd, boolean on, Object value)
         throws SocketException {
-        socketSetOption(cmd, on, value);
+        impl.socketSetOption(cmd, on, value);
     }
 
     int socketGetOption(int opt, Object iaContainerObj) throws SocketException {