patch 8.2.3309: Vim9: divide by zero causes a crash

Problem:    Vim9: divide by zero causes a crash.
Solution:   Give an error message. (closes #8727)
diff --git a/src/version.c b/src/version.c
index 867d894..97823df 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3309,
+/**/
     3308,
 /**/
     3307,