It looks like the lowest bit in the param name offset actually indicates
whether type description follows the name, and since the name offsets are
always aligned that makes sense.

This makes oleview.exe from PSDK running under Windows7 correctly show mix
of different very complex and relatively simple type descriptions generated
by widl's SLTG generator.
Signed-off-by: Dmitry Timoshkov <dmitry@baikal.ru>