MIDL won't parse structures with no fields.

include: The INewShortcutHookA, INewShortcutHookW and IRunnableTask interface in shobjidl.idl should be local.

They are declared such that they cannot be used over the network and
cause errors in MIDL when they are not declared local.

Since the PointOnStroke and DistanceFromPacket parameters are [in,
out] parameters the must be pointers.

include: Fix level of indirection of parameters in GetNotifyCmdLine function of IBackgroundCopyJob2 interface in bits1_5.idl.

The parameters should be double pointers to strings, not pointers to strings.

Also remove incorrect [optional] attributes from parameters.

Fixes a bug in automatic redirects with content.

Spotted by Henri Verbeet.

Use SIZE_T as it matches the size that Windows programs expect whereas
size_t is platform-dependent.