Fix so that graph picks up ProtoGraph attributes even if it none itself.

diff --git a/lib/cgraph/graph.c b/lib/cgraph/graph.c
index d2507daf8ecd6375143b8897ced0ec2fcf8c6b94..0d071d93045dcfe4d0f291dc80e3d1951840008a 100644 (file)
--- a/lib/cgraph/graph.c
+++ b/lib/cgraph/graph.c
@@ -82,7 +82,7 @@ Agraph_t *agopen1(Agraph_t * g)
        AGSEQ(g) = agnextseq(par, AGRAPH);
        dtinsert(par->g_dict, g);
     }                          /* else AGSEQ=0 */
-    if (g->desc.has_attrs)
+    if (!par || par->desc.has_attrs)
        agraphattr_init(g);
     agmethod_init(g, g);
     return g;