Create the correct number of points in deboornet constructor.

src/tinyspline.c

@@ -463,8 +463,9 @@ void ts_internal_deboornet_new(const tsBSpline *spline,
 {
 	const size_t dim = ts_bspline_dimension(spline);
 	const size_t deg = ts_bspline_degree(spline);
-	const size_t num_points = (size_t)(deg * (deg+1) * 0.5f);
-	/* Handle case deg <= 1 which generates too few points. */
+	const size_t order = ts_bspline_order(spline);
+	const size_t num_points = (size_t)(order * (order+1) * 0.5f);
+	/* Handle case order == 1 which generates too few points. */
 	const size_t fixed_num_points = num_points < 2 ? 2 : num_points;
 
 	const size_t sof_real = sizeof(tsReal);