patch 9.0.1484: Coverity warns for using invalid array index

Problem:    Coverity warns for using invalid array index.
Solution:   Add entry for Xchacha, even though it is not used.
diff --git a/src/version.c b/src/version.c
index 842b583..e5099dd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1484,
+/**/
     1483,
 /**/
     1482,