Set alpha to 1 before drawing because the current value could be
not 1, and PSsetrgbcolor doesn't set it.
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@37235 72102866-910b-0410-8b05-ffd578937521
more float -> CGFloat transitions
like the one before, OK Fred
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@36239 72102866-910b-0410-8b05-ffd578937521