submodule: use git rev-parse -q

diff --git a/commit.c b/commit.c
index dc0c5bfdab7296bf7febb6f1b1aad64550838c15..c99db162a48e0a47e73e6bfc2ae5fd4b7c9dfa1a 100644 (file)
--- a/commit.c
+++ b/commit.c
@@ -160,7 +160,7 @@ struct commit_graft *read_graft_line(char *buf, int len)
        return graft;
 }
 
-int read_graft_file(const char *graft_file)
+static int read_graft_file(const char *graft_file)
 {
        FILE *fp = fopen(graft_file, "r");
        char buf[1024];