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/main.c b/src/main.c
index 2ec5c26..103c53c 100644
--- a/src/main.c
+++ b/src/main.c
@@ -2769,7 +2769,7 @@
 	if (parmp->tty_fail && (!stdout_isatty || !input_isatty))
 	    exit(1);
 	if (scriptin[0] == NULL)
-	    ui_delay(2000L, TRUE);
+	    ui_delay(2005L, TRUE);
 	TIME_MSG("Warning delay");
     }
 }