[vala/0.40] girparser: Decrease return_array_length_idx for transformed function

[Rico Tzschichholz <ricotz src gnome org>]

commit e378f0ed4ee009ff5931a3c76a014c5abd8ad7ba
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon Mar 2 23:56:57 2020 +0100

    girparser: Decrease return_array_length_idx for transformed function

 vala/valagirparser.vala | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/vala/valagirparser.vala b/vala/valagirparser.vala
index da43fab21..56e2a8950 100644
--- a/vala/valagirparser.vala
+++ b/vala/valagirparser.vala
@@ -4080,6 +4080,7 @@ public class Vala.GirParser : CodeVisitor {
                                        ns.remove_member (node);
                                        node.name = new_name;
                                        node.parameters.remove_at (0);
+                                       node.return_array_length_idx--;
                                        method.name = new_name;
                                        method.binding = MemberBinding.INSTANCE;
                                        parent.add_member (node);