patch 8.1.2313: debugging where a delay comes from is not easy

Problem:    Debugging where a delay comes from is not easy.
Solution:   Use different values when calling ui_delay().
diff --git a/src/fileio.c b/src/fileio.c
index 85c5e68..6f8c8f9 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -4191,7 +4191,7 @@
 			if (!focus)
 #endif
 			    /* give the user some time to think about it */
-			    ui_delay(1000L, TRUE);
+			    ui_delay(1004L, TRUE);
 
 			/* don't redraw and erase the message */
 			redraw_cmdline = FALSE;