fio: fix segfault on 32bits platforms

Uses wrong type in log_info().

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/stat.c b/stat.c
index 66bea0a..581eead 100644
--- a/stat.c
+++ b/stat.c
@@ -573,7 +573,7 @@
 					ts->short_io_u[0], ts->short_io_u[1],
 					ts->short_io_u[2]);
 	if (ts->continue_on_error) {
-		log_info("     errors    : total=%lu, first_error=%d/<%s>\n",
+		log_info("     errors    : total=%llu, first_error=%d/<%s>\n",
 					ts->total_err_count,
 					ts->first_error,
 					strerror(ts->first_error));