patch 8.2.1285: Vim9: argument types are not checked on assignment

Problem:    Vim9: argument types are not checked on assignment.
Solution:   Check function argument types. (issue #6507)
diff --git a/src/version.c b/src/version.c
index 91edd4a..5563bd1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1285,
+/**/
     1284,
 /**/
     1283,