patch 8.2.4016: Vim9: incorrect error for argument that is shadowing var

Problem:    Vim9: incorrect error for argument that is shadowing var.
Solution:   Ignore variable that is not in block where the function was
            defined.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4016,
 /**/
     4015,
 /**/