aga: Fix initialization bug in aga_for_each_edge_info

[ccan] / ccan / aga / aga.h

diff --git a/ccan/aga/aga.h b/ccan/aga/aga.h
index 665dcb3c6c64450d537fc771080f2576663c5503..aa4126a79768d5afe55e9ada39c71b34b684c1b6 100644 (file)
--- a/ccan/aga/aga.h
+++ b/ccan/aga/aga.h
@@ -239,7 +239,7 @@ int aga_edge_info(const struct aga_graph *g, const struct aga_node *n,
             (_e) = aga_next_edge((_g), (_n), (_e)))
 
 #define aga_for_each_edge_info(_e, _ei, _err, _g, _n)                  \
-       for ((_e) = aga_first_edge((_g), (_n));                         \
+       for ((_err) = 0, (_e) = aga_first_edge((_g), (_n));             \
             (_e) && ((((_err) = aga_edge_info((_g), (_n), (_e), &(_ei)))) == 0); \
             (_e) = aga_next_edge((_g), (_n), (_e)))                    \
                if ((_ei).to)