Comment 1 for bug 331857

Actually, it was conceived to be like this.

The real problem here happens when a user tries something like this:

data = [(-1, -16, 12), (-12, 17, 11), (-4, 6, 5), (4, -20, 12), (13, -3, 21), (7, 14, 20), (-11, -2, 18), (19, 7, 18), (-10, -19, 15), (-17, -2, 6), (-9, 4, 10), (14, 11, 16), (13, -11, 18), (20, 20, 16), (7, -8, 15), (-16, 17, 16), (16, 9, 9)]

colors = [ (0,0,0,0.25), (1,0,0,0.75) ]
CairoPlot.scatter_plot ( 'cross_2_variable_radius', data = data, width = 500, height = 500, border = 20,
                                  axis = True, discrete = True, dots = 2, grid = True,
                                  x_title = "x axis", y_title = "y axis", circle_colors = colors )

On this example, the radius is variable, so allowing the whole circle to be shown on the borders could compromise the labels or axis titles presentation.