patch 8.2.3133: Vim9: memory leak when add() fails

Problem:    Vim9: memory leak when add() fails.
Solution:   Allocate listitem_T after type check.
diff --git a/src/version.c b/src/version.c
index e2108a0..39d8f14 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3133,
+/**/
     3132,
 /**/
     3131,