r7870: fixed the RPC-SCHANNEL test. It turned out it was my const changes, as

r7870: fixed the RPC-SCHANNEL test. It turned out it was my const changes, as
they slightly changed the semantics of value() in pidl, which broke
a optimisation hack in some of our IDL files.

I've changed the idl files to remove the hack for now. Sometime we
need to find a better way to handle these :-)
(This used to be commit 765f75ea630b13b1605409ff47a52cc11a1e496b)