patch 8.1.0809: too many #ifdefs

Problem:    Too many #ifdefs.
Solution:   Graduate FEAT_MBYTE, part 3.
diff --git a/src/version.c b/src/version.c
index da24897..79778cd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -792,6 +792,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    809,
+/**/
     808,
 /**/
     807,