d3dx9: Use intermediate surfaces for loading from unmappable source surfaces in D3DXLoadSurfaceFromSurface().
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Matteo Bruni <mbruni@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>