patch 8.2.0981: Vim9: cannot compile "[var, var] = list"

Problem:    Vim9: cannot compile "[var, var] = list".
Solution:   Implement list assignment.
diff --git a/src/eval.c b/src/eval.c
index 6ca3628..dfd8242 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -1431,7 +1431,7 @@
     if (fi == NULL)
 	return NULL;
 
-    expr = skip_var_list(arg, TRUE, &fi->fi_varcount, &fi->fi_semicolon);
+    expr = skip_var_list(arg, TRUE, &fi->fi_varcount, &fi->fi_semicolon, FALSE);
     if (expr == NULL)
 	return fi;