typo in Runtime[In]VisibleTypeAnnotations_attribute definition?

[Michael Ernst]

Eric Bruneton suggested:

> I think "u2 attribute_length;" should be replaced with "u4
> attribute_length;" in the definition of the
> Runtime[In]VisibleTypeAnnotations_attribute structure, in Section 3, in
> order to comply with the general format of attributes
> (http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.7).

I agree, and I have made this change.

Expert Group, let me know if you have any concerns.

Eric, thanks very much for noticing this inconsistency!

		    -Mike