allow input=output for buckle function
allow input=output for buckle function

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