wrapping fixed for QwtKnob


git-svn-id: svn://svn.code.sf.net/p/qwt/code/branches/qwt-6.1@2001 29e17f8d-cf37-471e-a288-72cc03a76eda
curve fill/outline drawing order inverted


git-svn-id: svn://svn.code.sf.net/p/qwt/code/branches/qwt-6.1@2004 29e17f8d-cf37-471e-a288-72cc03a76eda