D'oh, I didn't check in 'defgeneric' in the previous commit,

D'oh, I didn't check in 'defgeneric' in the previous commit,
which caused a unit test to fail. Sorry about that.

Make 'make-load-form' for protobuf schemas and messages update
*all-protobufs* and *all-messages*, since 'initialize-instance'
doesn't get called at load time (something I did not know!).

This time it passes 'precheckin --full', and I'll be sure to
commit all the files.

git-svn-id: http://svn.internal.itasoftware.com/svn/ita/trunk/qres/lisp/quux/protobufs@543323 f8382938-511b-0410-9cdd-bb47b084005c