[4/6] WineD3D: Add GL_APPLE_flush_buffer_range

[Henri Verbeet]

2010/1/1 Stefan Dösinger <stefan at codeweavers.com>:
> +typedef void (WINE_GLAPI *PGLBUFFERPARAMETERIAPPLE) (GLenum target, GLenum pname, GLint param);
> +typedef void (WINE_GLAPI *PGLFLUSHMAPPEDBUFFERRANGEAPPLE) (GLenum target, ptrdiff_t offset, ptrdiff_t size);

Any reason for not using the same naming convention as the rest of the
file? Also, "ptrdiff_t" doesn't match the spec at
http://www.opengl.org/registry/specs/APPLE/flush_buffer_range.txt.