[cairo] Problems with cairo_get_line_width and "new" semantics

[Bill Spitzak]

Bill Spitzak wrote:

> cairo_get_line_width() returns 1/cairo_get_dashscale() times the square 
> root of the determinant of the penCTM divided by the CTM.

Arrgh. That should just be:

cairo_get_line_width() returns the square root of the determinant of the 
penCTM divided by the CTM.

The dashscale is irrelevant.