defaults for radialgradient cx/cy/r (fixes Issue 122)
defaults for radialgradient cx/cy/r (fixes Issue 122)

git-svn-id: 1480ed9eeae8ad7939024d1c38d64d1a40ec6245@128 4f656584-2f64-8888-3fab-3bd369ce20a5

Causata/canvg,evantill/canvg-clone