patch 8.0.1230: CTRL-A in Visual mode uses character after selection

Problem:    CTRL-A in Visual mode uses character after selection. (Nikolai
            Pavlov)
Solution:   Check the length before using a character.
diff --git a/src/version.c b/src/version.c
index 1da082d..221c757 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1230,
+/**/
     1229,
 /**/
     1228,