difftool: hack around -Wzero-length-format warning

diff --git a/trailer.c b/trailer.c
index d19a92cd1c4448bf4c3f34f387554ba8719520a7..f0ecde2d2f8b35c565ab176c76882a5fee8d8fb2 100644 (file)
--- a/trailer.c
+++ b/trailer.c
@@ -416,12 +416,9 @@ static int set_if_missing(struct conf_info *item, const char *value)
 static void duplicate_conf(struct conf_info *dst, const struct conf_info *src)
 {
        *dst = *src;
-       if (src->name)
-               dst->name = xstrdup(src->name);
-       if (src->key)
-               dst->key = xstrdup(src->key);
-       if (src->command)
-               dst->command = xstrdup(src->command);
+       dst->name = xstrdup_or_null(src->name);
+       dst->key = xstrdup_or_null(src->key);
+       dst->command = xstrdup_or_null(src->command);
 }
 
 static struct arg_item *get_conf_item(const char *name)