[3/3] gdiplus: get_log_fontW helper requires a valid graphics object.

[Vincent Povirk]

> +        GdipFree(backup);

I think you want GdipDeletePath.

This seems very convoluted. Couldn't we just skip the size conversion
in get_log_fontW when graphics is NULL? Any cases where the scaling
would produce a size other than the em size need to be fixed in
GdipAddPathString anyway.