merge: small leakfix and code simplification

When parsing a merged object name like "foo~20" to formulate a merge
summary "Merge branch foo (early part)", a temporary strbuf is used,
but we forgot to deallocate it when we failed to find the named
branch.

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

diff --git a/builtin/merge.c b/builtin/merge.c
index 1d4fbd3..b2d0332 100644 (file)
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -491,8 +491,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
        }
        if (len) {
                struct strbuf truname = STRBUF_INIT;
-               strbuf_addstr(&truname, "refs/heads/");
-               strbuf_addstr(&truname, remote);
+               strbuf_addf(&truname, "refs/heads/%s", remote);
                strbuf_setlen(&truname, truname.len - len);
                if (ref_exists(truname.buf)) {
                        strbuf_addf(msg,
@@ -503,6 +502,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
                        strbuf_release(&truname);
                        goto cleanup;
                }
+               strbuf_release(&truname);
        }
 
        if (!strcmp(remote, "FETCH_HEAD") &&