hg: jdk8/tl/jdk: 8005394: Base64.Decoder/Encoder.wrap(XStream) don't throw NPE for null args passed

[xueming . shen]

Changeset: 857d99bef21d
Author:    sherman
Date:      2013-01-31 11:09 -0800
URL:       http://hg.openjdk.java.net/jdk8/tl/jdk/rev/857d99bef21d

8005394: Base64.Decoder/Encoder.wrap(XStream) don't throw NPE for null args 
passed
Summary: to check null for dec/enc.wrap methods
Reviewed-by: alanb

! src/share/classes/java/util/Base64.java
! test/java/util/Base64/TestBase64.java