[ft] Weird advance values after FT_Set_Transform()

[luserdroog .]

Hello all,

I'm having some difficulty using FT_Set_Transform with FT_Render_Glyph.
The program in this gist demonstrates the problem.
https://gist.github.com/luser-dr00g/9a45058a5fe116fcab50

Having scaled, I appear to get a nice horizontal vector (512,0). But,
setting a matrix with 2x scaling and 45-degree rotation is yielding
unexpected values (1,1).

Does anyone have a clue what I've done wrong?