patch 9.0.0484: in :def function all closures in loop get the same variables

Problem:    In a :def function all closures in a loop get the same variables.
Solution:   Add ENDLOOP at break, continue and return if needed.
diff --git a/src/version.c b/src/version.c
index 8b6367a..3dd71af 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    484,
+/**/
     483,
 /**/
     482,