append_to_rev_graph: use local variable

diff --git a/tig.c b/tig.c
index 5a65d245b0cc3cbc77c97d080e1a0186afc41aa1..cc39d7ea8076c1ef6c7882919ea9fde2ce4e4fa9 100644 (file)
--- a/tig.c
+++ b/tig.c
@@ -2708,8 +2708,10 @@ graph_parent_is_merge(struct rev_graph *graph)
 static inline void
 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
 {
-       if (graph->commit->graph_size < ARRAY_SIZE(graph->commit->graph) - 1)
-               graph->commit->graph[graph->commit->graph_size++] = symbol;
+       struct commit *commit = graph->commit;
+
+       if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
+               commit->graph[commit->graph_size++] = symbol;
 }
 
 static void