shell32: Make sure BrowseForFolder doesn't return NULL for the Desktop folder as this means a cancel.

shell32/tests: ILFree() and ILIsEqual() are exported by ordinal only on Win9x. So use GetProcAddress().

Unless specified otherwise they are implemented by a '__regs_' function.
Keep track of the '-i386' flag so we can detect CONTEXT* vs. CONTEXT86* mismatches.
Remove an unneeded and broken hack meant to fudge the number of parameters.

oleaut32: Fix the return value of ITypeInfo::Invoke when the property-put named argument isn't DISPID_PROPERTYPUT.

If an IDispatch object is returned from in the retval for a propget 
function and an extra parameter was passed in to ITypeInfo::Invoke then 
it should call IDispatch::Invoke on the returned object with the extra 
parameter to retrieve the value of the object, which is then returned in 
pVarResult.

oleaut32: Comment out "dual" attribute of IKindaEnumWidget in tmarshal test to cause the interface to be marshaled correctly.

This fixes a bunch of tmarshal tests.