patch 8.1.0198: there is no hint that syntax is disabled for 'redrawtime'

Problem:    There is no hint that syntax is disabled for 'redrawtime'.
Solution:   Add a message.
diff --git a/src/version.c b/src/version.c
index 86413b0..691800c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -790,6 +790,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    198,
+/**/
     197,
 /**/
     196,