[vala/staging] codegen: Sealed class in external package is not special

[Rico Tzschichholz <ricotz src gnome org>]

commit 2ed5c4d693ab1aaf035664417570ca7427e18dd6
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon Sep 20 21:57:27 2021 +0200

    codegen: Sealed class in external package is not special
    
    Don't falsely generate macros and typedefs leading to conflicts
    
    Regression of 7ebb25ffa2226a8a098b8b1ea2cef64d1015b4de
    
    Fixes https://gitlab.gnome.org/GNOME/vala/issues/1229

 codegen/valaccodebasemodule.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/codegen/valaccodebasemodule.vala b/codegen/valaccodebasemodule.vala
index 06b745463..14a8efa91 100644
--- a/codegen/valaccodebasemodule.vala
+++ b/codegen/valaccodebasemodule.vala
@@ -694,7 +694,7 @@ public abstract class Vala.CCodeBaseModule : CodeGenerator {
                        return false;
                }
                // sealed classes are special
-               if (sym is Class && ((Class) sym).is_sealed) {
+               if (!sym.external_package && sym is Class && ((Class) sym).is_sealed) {
                        return false;
                }
                if (sym.external_package || in_generated_header