[OpenJDK 2D-Dev] request for review: xrender pipeline ignores center-coordinates of RadialGradient

[Clemens Eisserer]

Please find a more extensive fix at:
http://cr.openjdk.java.net/~ceisserer/fix13/webrev.02/

In addition to the fixes in webrev.00, this one also fixes the
TexturePaint issues reported by Phil.
With this patch the TransformedPaintTest is rendered correctly.

The problem with TexturePaint was basically the same as with
RadialGradientPaint, the initial transform is overwritten by the
currently set Graphic2D's transformation.
The solution was to additionally store this transformation (includes
scale and translation set by the TexturePaint's
Rectangle2D-parameter).

Thanks, Clemens