avoid shifting signed integers 31 bits

diff --git a/builtin/fmt-merge-msg.c b/builtin/fmt-merge-msg.c
index 46c92c174fd06ba5e0b2a06dec13733842bb48f3..846004b83358cd8adfd5f7de96b2d551700037a1 100644 (file)
--- a/builtin/fmt-merge-msg.c
+++ b/builtin/fmt-merge-msg.c
@@ -1,5 +1,6 @@
 #include "builtin.h"
 #include "cache.h"
+#include "refs.h"
 #include "commit.h"
 #include "diff.h"
 #include "revision.h"