files-backend: don't rewrite the `packed-refs` file unnecessarily

diff --git a/strbuf.c b/strbuf.c
index c4e91a66567304ee7732e1121229e7098f45384a..323c49ceb35cb053434248df869578e649ccadc0 100644 (file)
--- a/strbuf.c
+++ b/strbuf.c
@@ -476,6 +476,7 @@ int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
        /* Translate slopbuf to NULL, as we cannot call realloc on it */
        if (!sb->alloc)
                sb->buf = NULL;
+       errno = 0;
        r = getdelim(&sb->buf, &sb->alloc, term, fp);
 
        if (r > 0) {
@@ -779,7 +780,7 @@ char *xstrfmt(const char *fmt, ...)
 }
 
 void strbuf_addftime(struct strbuf *sb, const char *fmt, const struct tm *tm,
-                    int tz_offset, const char *tz_name)
+                    int tz_offset, int suppress_tz_name)
 {
        struct strbuf munged_fmt = STRBUF_INIT;
        size_t hint = 128;
@@ -808,8 +809,7 @@ void strbuf_addftime(struct strbuf *sb, const char *fmt, const struct tm *tm,
                        fmt++;
                        break;
                case 'Z':
-                       if (tz_name) {
-                               strbuf_addstr(&munged_fmt, tz_name);
+                       if (suppress_tz_name) {
                                fmt++;
                                break;
                        }