patch 8.0.1200: tests switch the bell off twice

Problem:    Tests switch the bell off twice.
Solution:   Don't set 'belloff' in individual tests. (Christian Brabandt)
diff --git a/src/version.c b/src/version.c
index 5baff48..30a13fc 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1200,
+/**/
     1199,
 /**/
     1198,