- dwInstance and dwDriver are a DWORD_PTR.
- acmF*Enum functions take a DWORD_PTR as 4th parameter.
- The last parameter of SendDlgItemMessage and MSACM_Message is a
  LPARAM.

Fixes 63 Win64 compile warnings.

gdi32: The special handling of the character codes metrics for symbol fonts should be based on the presence of the MS symbol charmap rather than whether the font is enumerated as SYMBOL_CHARSET.

GdipCreateBitmapFromHBITMAP currently assumes that all bitmaps are
top-down, even though a positive height (which it also assumes)
signals a bottom-up DIB. The net result is that
GdipCreateBitmapFromHBITMAP flips images vertically.

We need to take into account the trailing NULL in envp.

gdi32/tests: Win9x doesn't ensure the facename is nul terminated. Compare the logfont one element at a time.

Add a new wined3d-internal PreLoad function to textures and surfaces
that takes a parameter specifying wether the rgb or srgb texture
should be loaded.