commit.h: reduce unnecessary includes

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/commit.c b/commit.c
index 878b4473e4..10676165a1 100644
--- a/commit.c
+++ b/commit.c
@@ -26,6 +26,7 @@
 #include "run-command.h"
 #include "setup.h"
 #include "shallow.h"
+#include "tree.h"
 #include "hook.h"
 
 static struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **);