[SHELL32]
* Move the IID_NULL_PPV_ARG macro to the shobj_undoc header, next to the (also ros-specific) IID_PPV_ARG macro, so that it can be used elsewhere.
[SHELL32]
* Make use of IID_NULL_PPV_ARG in all the calls to GetUIObjectOf, and fix one instance of mismatched riid/pointer.
CORE-7330
svn path=/branches/shell-experiments/; revision=63044