[PATCH v3 3/6] commit-graph: add missing forward declaration

[Jonathan Tan <jonathantanmy@xxxxxxxxxx>]

Signed-off-by: Jonathan Tan <jonathantanmy@xxxxxxxxxx>
---
 commit-graph.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/commit-graph.h b/commit-graph.h
index 506cb45fb1..674052bef4 100644
--- a/commit-graph.h
+++ b/commit-graph.h
@@ -5,6 +5,8 @@
 #include "repository.h"
 #include "string-list.h"
 
+struct commit;
+
 char *get_commit_graph_filename(const char *obj_dir);
 
 /*
-- 
2.18.0.203.gfac676dfb9-goog