[tex-live] Small scaling values in xetex / (x)dvipdfm(x)

[Akira Kakuto]

Dear David,

> The xdvipdfmx sources (pdfdraw.c) have
> ... ...

I'm not familiar with pdfdraw.c, thus I have replaced a
small number 1.e-8 by OUR_EPSILON (=2.5e-16) in pdfdraw.c,
hoping that it does not break the author's intention (r44252).

> Even if the transform really is non-invertible for example
>
> \scalebox{0}{oops}

Apparently this may not be solved by r44252.

Best,
Akira