oleaut32: Fix a one-off test failure in the tmarshal tests - TYPE_E_LIBNOTREGISTERED is an expected return value.

oleaut32: A value of PARAMFLAG_FNONE for wParamFlags means that the parameter is also marshaled and unmarshaled in the PARAMFLAG_FOUT case.

This also makes the headers and implementation more consistent.

number of items however the if statement used nIHeight (just the
height of 1 item) and not nHeight (the height all the items).