Fix braino.
diff --git a/infocalypse/choose.py b/infocalypse/choose.py
--- a/infocalypse/choose.py
+++ b/infocalypse/choose.py
@@ -127,7 +127,7 @@ def low_block_cost_edges(graph, known_ed
paths = graph.enumerate_update_paths(from_index + 1,
graph.latest_index, MAX_PATH_LEN - 1)
if len(paths) == 0:
- return
+ return []
first = []