widl: Make to interfaces RPC_FC_OP instead of RPC_FC_RP

[Rob Shearman]

2009/1/4 Michael Karcher <wine at mkarcher.dialup.fu-berlin.de>:
> This eliminates the wrong null pointer check for pointers to interfaces.

This isn't correct. Object pointers are generated, I believe, in the
case where we have an [in, out] unique pointer, since if the pointer
has been set to NULL the previous memory needs to be freed (on the
client side).

The correct fix for the problem you see is to implement (yet another)
check in cant_be_null.

-- 
Rob Shearman