Various fixes for tests in scripts/plot plot/cla.m: Use figure number 1232. plot/clf.m: Split test into two. plot/findall.m: Check only for graphic objects in figure 1232. plot/findall.m: Ditto. plot/gcf.m: Simplify test. plot/line.m: Check against default values now. plot/whitebg.m: Restore default values after tests.

function [y, dy] = polyval (p, varargin)
  if (nargout == 2)
    [y, dy] = polyval (fliplr(p.poly), varargin{:});
  else
    y = polyval (fliplr(p.poly), varargin{:});
  endif
endfunction