RFR: JDK-8219483: j.l.c.ClassDesc::nested(String, String...) doesn't throw NPE if any arg is null

[Vicente Romero]

Hi,

Please review fix [1] and CSR [2] for [3]. The API for method 
j.l.c.ClassDesc::nested(String, String...) states that it should throw 
NPE if any of the arguments is null. The implementation is not in sync 
with the API and should be corrected,

Thanks,
Vicente

[1] http://cr.openjdk.java.net/~vromero/8219483/webrev.00/
[2] https://bugs.openjdk.java.net/browse/JDK-8223034
[3] https://bugs.openjdk.java.net/browse/JDK-8219483