hg: jdk8/tl/jdk: 8014814: (str) StringBuffer "null" is not appended

[david.holmes at oracle.com]

Changeset: a1a8e71e130a
Author:    dholmes
Date:      2013-05-22 20:21 -0400
URL:       http://hg.openjdk.java.net/jdk8/tl/jdk/rev/a1a8e71e130a

8014814: (str) StringBuffer "null" is not appended
Reviewed-by: alanb

! src/share/classes/java/lang/StringBuffer.java
! test/java/lang/StringBuffer/ToStringCache.java