[ft] Random crash in FRABK.TTF

[Boris Letocha]

Hi,

I think I have found reason for crash in case this font which has error
in bytecode, is loaded after another font which leaves initialized
"exec->zpX.n_points" to bigger number then 9. Of course you need to have
enabled bytecode interpretter. It is not reproducible in ftview or
ftstring because for first font it is initialized correctly.

I fixed it adding these lines into ttinterp.c:
    exec->zp0.n_points   = 0;
    exec->zp0.n_contours = 0;
    exec->zp1.n_points   = 0;
    exec->zp1.n_contours = 0;
    exec->zp2.n_points   = 0;
    exec->zp2.n_contours = 0;
After these in method TT_Load_Context:
    exec->pts.n_points   = 0;
    exec->pts.n_contours = 0;

Please let me know if you agree with my fix.

Thanks,

Boris

FRABK.ZIP
Description: FRABK.ZIP