patch 9.0.0489: using "end_lnum" with virtual text causes problems

Problem:    Using "end_lnum" with virtual text causes problems.
Solution:   Disallow using "end_lnum" with virtual text. (closes #11151)
            Also disallow "end_col" and "length".
diff --git a/src/version.c b/src/version.c
index 93e706d..f4c5fb4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    489,
+/**/
     488,
 /**/
     487,