builtin-grep: unparse more command line options.

diff --git a/diffcore-order.c b/diffcore-order.c
index b38122361f837e2e2577a89ae7aec311730b7f10..0bc2b22f848457a8e6ffafc6a1d9a26be677209f 100644 (file)
--- a/diffcore-order.c
+++ b/diffcore-order.c
@@ -105,9 +105,13 @@ static int compare_pair_order(const void *a_, const void *b_)
 void diffcore_order(const char *orderfile)
 {
        struct diff_queue_struct *q = &diff_queued_diff;
-       struct pair_order *o = xmalloc(sizeof(*o) * q->nr);
+       struct pair_order *o;
        int i;
 
+       if (!q->nr)
+               return;
+
+       o = xmalloc(sizeof(*o) * q->nr);
        prepare_order(orderfile);
        for (i = 0; i < q->nr; i++) {
                o[i].pair = q->queue[i];