allow copy of any b-spline
allow copy of any b-spline

arneboe/tinyspline,msteinbeck/tinyspline,retuxx/tinyspline,pellaeon/tinyspline-example,msteinbeck/tinyspline,arneboe/tinyspline,msteinbeck/tinyspline,pellaeon/tinyspline-example,msteinbeck/tinyspline,msteinbeck/tinyspline,retuxx/tinyspline,msteinbeck/tinyspline,msteinbeck/tinyspline,retuxx/tinyspline,msteinbeck/tinyspline