Don't try to process hard-link data in list-only mode.

hlink.c

@@ -24,6 +24,7 @@
 
 extern int verbose;
 extern int dry_run;
+extern int list_only;
 extern int am_sender;
 extern int inc_recurse;
 extern int do_xfers;
@@ -174,6 +175,7 @@ static void match_gnums(int32 *ndx_list, int ndx_count)
  * to first when we're done. */
 void match_hard_links(struct file_list *flist)
 {
+	if (!list_only) {
 		int i, ndx_count = 0;
 		int32 *ndx_list;
 
@@ -191,6 +193,7 @@ void match_hard_links(struct file_list *flist)
 			match_gnums(ndx_list, ndx_count);
 
 		free(ndx_list);
+	}
 	if (protocol_version < 30)
 		idev_destroy();
 }