Index: obj_pinvia_therm.c
===================================================================
--- obj_pinvia_therm.c	(revision 12420)
+++ obj_pinvia_therm.c	(revision 12421)
@@ -48,6 +48,41 @@
 	pcb_polyarea_t *p;
 };
 
+static pcb_polyarea_t *pcb_pa_diag_line(pcb_coord_t X, pcb_coord_t Y, pcb_coord_t l, pcb_coord_t w, pcb_bool rt)
+{
+	pcb_pline_t *c;
+	pcb_vector_t v;
+	pcb_coord_t x1, x2, y1, y2;
+
+	if (rt) {
+		x1 = (l - w) * M_SQRT1_2;
+		x2 = (l + w) * M_SQRT1_2;
+		y1 = x1;
+		y2 = x2;
+	}
+	else {
+		x2 = -(l - w) * M_SQRT1_2;
+		x1 = -(l + w) * M_SQRT1_2;
+		y1 = -x1;
+		y2 = -x2;
+	}
+
+	v[0] = X + x1;
+	v[1] = Y + y2;
+	if ((c = pcb_poly_contour_new(v)) == NULL)
+		return NULL;
+	v[0] = X - x2;
+	v[1] = Y - y1;
+	pcb_poly_vertex_include(c->head.prev, pcb_poly_node_create(v));
+	v[0] = X - x1;
+	v[1] = Y - y2;
+	pcb_poly_vertex_include(c->head.prev, pcb_poly_node_create(v));
+	v[0] = X + x2;
+	v[1] = Y + y1;
+	pcb_poly_vertex_include(c->head.prev, pcb_poly_node_create(v));
+	return pcb_poly_from_contour(c);
+}
+
 static pcb_polyarea_t *square_therm(pcb_pin_t *pin, pcb_cardinal_t style)
 {
 	pcb_polyarea_t *p, *p2;