patch 8.2.3429: leaking memory when assigning to list or dict

Problem:    Leaking memory when assigning to list or dict.
Solution:   Free the list or dict type before overwriting it.
diff --git a/src/version.c b/src/version.c
index 2d6f6c7..d10f8aa 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3429,
+/**/
     3428,
 /**/
     3427,