interpret_nth_last_branch(): plug small memleak

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/sha1_name.c b/sha1_name.c
index f54b6cb36a0a67f6319d3ff56e92bbac55ecd639..4c0370bb796eb7bd69992e1d09cc5ae98df16881 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -754,7 +754,7 @@ static int grab_nth_branch_switch(unsigned char *osha1, unsigned char *nsha1,
 int interpret_nth_last_branch(const char *name, struct strbuf *buf)
 {
        long nth;
-       int i;
+       int i, retval;
        struct grab_nth_branch_switch_cbdata cb;
        const char *brace;
        char *num_end;
@@ -774,17 +774,21 @@ int interpret_nth_last_branch(const char *name, struct strbuf *buf)
        for (i = 0; i < nth; i++)
                strbuf_init(&cb.buf[i], 20);
        cb.cnt = 0;
+       retval = 0;
        for_each_reflog_ent("HEAD", grab_nth_branch_switch, &cb);
        if (cb.cnt < nth)
-               return 0;
+               goto release_return;
        i = cb.cnt % nth;
        strbuf_reset(buf);
        strbuf_add(buf, cb.buf[i].buf, cb.buf[i].len);
+       retval = brace-name+1;
+
+release_return:
        for (i = 0; i < nth; i++)
                strbuf_release(&cb.buf[i]);
        free(cb.buf);
 
-       return brace-name+1;
+       return retval;
 }
 
 /*