d3drm: If there is no texture coordinates in loaded mesh, generate default texture coordinates for each vertex.

d3drm: Texture callback cannot be passed directly. Texture object argument is different so disable it for now.

wined3d: Use the same code for parsing the WGL extension string as for the regular GL extension string.

strmbase: Allow constructor function to be NULL but display an error saying we don't implement the CLSID.