From e4b36ae8bbebbb697cf60a83dbdc37d75408bb07 Mon Sep 17 00:00:00 2001
From: Marian Honsch <marian.honsch@gmail.com>
Date: Wed, 25 May 2011 15:33:16 +0200
Subject: [PATCH] label also with null weight

---
 ext/cIGraph_community.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 mode change 100644 => 100755 ext/cIGraph_community.c

diff --git a/ext/cIGraph_community.c b/ext/cIGraph_community.c
old mode 100644
new mode 100755
index 69568a5..854ce6b
--- a/ext/cIGraph_community.c
+++ b/ext/cIGraph_community.c
@@ -712,7 +712,7 @@ igraph_arpack_options_init(&arpack_opt);
 
  igraph_community_label_propagation(graph,
                                     &membership,
-                                    &weights_vec,
+                                    igraph_vector_size(&weights_vec) > 0 ? &weights_vec : NULL,
                                     NULL,
                                     NULL);