[vala/0.34] codegen: Don't write declaration of CreationMethod for compact-classes twice

[Rico Tzschichholz <ricotz src gnome org>]

commit ce914b56277af41de58ab17be72bd6ba02e2e87b
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Fri Nov 11 23:39:21 2016 +0100

    codegen: Don't write declaration of CreationMethod for compact-classes twice
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772661

 codegen/valaccodemethodmodule.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/codegen/valaccodemethodmodule.vala b/codegen/valaccodemethodmodule.vala
index d147eb1..fc5ffc7 100644
--- a/codegen/valaccodemethodmodule.vala
+++ b/codegen/valaccodemethodmodule.vala
@@ -188,7 +188,7 @@ public abstract class Vala.CCodeMethodModule : CCodeStructModule {
                        decl_space.add_function_declaration (function);
                }
 
-               if (m is CreationMethod && cl != null) {
+               if (is_gtypeinstance_creation_method (m)) {
                        // _construct function
                        function = new CCodeFunction (get_ccode_real_name (m));