using clip paths instead of clip regions ( slow for huge circles )
using clip paths instead of clip regions ( slow for huge circles )


git-svn-id: 3c9f1a8a7aba09e7d057aa0b0c15e2722bd05345@181 78d0f0fb-6126-4564-b144-e0dd33131c99

XelaRellum/qwtpolar,XelaRellum/qwtpolar,XelaRellum/qwtpolar