oleaut32: Calling SetLcid with LOCALE_NEUTRAL is a special case which sets the first header lcid to US English and the second one to 0.

This causes memory corruption on MacOS, even if the app does not
reference undeclared arrays. Trying to avoid potential breakage in
broken apps which provoke undefined behavior is pointless if it causes
actual breakage in well-behaved apps (on ill-behaved drivers).

Thanks to Roland Scheidegger from Tungsten Graphics for the suggestion to
replace the 2 movs + dp2add with two MADs, where one can conveniently be
coissued with the other dp2add.

According to Stefan these are either typos or leftovers from using GL_HILO8_NV.

oleaut32: TLibAttr.lcid is read from the second lcid field in the header. Confirmed by manually editing a tlb file.

For most conversions the internal format is irrelevant. Color key conversions
are an exception, because they need to ensure an alpha channel is present.