File graphviz-neato_splines.patch of Package graphviz-plugins

--- lib/neatogen/neatosplines.c
+++ lib/neatogen/neatosplines.c
@@ -61,6 +61,8 @@
 	n = n + poly[i]->pn;
     }
     bar = N_GNEW(n, Pedge_t);
+    if (bar == (Pedge_t *)1)
+    	bar = (Pedge_t *)0;
     b = 0;
     for (i = 0; i < npoly; i++) {
 	if (i == pp)