Please describe the problem:
Rendering a SVG that includes <clipPath> with rsvg_handle_render_cairo() and cairo_scale() causes incorrect result.

This bug was reported on cairo ML:
http://lists.freedesktop.org/archives/cairo/2006-October/008150.html
http://lists.freedesktop.org/archives/cairo/2006-October/008162.html



Steps to reproduce:
1. Sample code:
  cairo_scale(ctx, 0.5, 0.5);

  h = rsvg_handle_new_from_file("test.svg", &error);
  rsvg_handle_render_cairo(h, ctx);

2. Sample SVG:
<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
  "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg width="400" height="400" viewBox="0 0 400 400"
   xmlns="http://www.w3.org/2000/svg"
   xmlns:xlink="http://www.w3.org/1999/xlink"
   version="1.1" id="svg1">
<defs>
       <clipPath id="1001">
               <rect x="100" y="100" width="200" height="200"/>
       </clipPath>
</defs>
<g id="showclip">
       <rect style="stroke: #000000; fill:none;" x="100" y="100" width="200"
height="200"/>
</g>
<g id="lines">
       <path style="stroke: #000000;" d="M 150,50 L 150,350"/>
       <path style="stroke: #000000; clip-path:url(#1001);" d="M 250,50 L 250,350"/>
</g>
</svg>


Actual results:
A right line is rendered incorrect position.
http://downloads.globalmaritime.com/ts/cairo/

Expected results:
A right line is rendered in a rectangle.

Does this happen every time?
Only scale isn't 1.0.

Other information: