[vala] Fix non-GObject interface properties in GObject classes

[Jürg Billeter <juergbi src gnome org>]

commit af12d4dcda4fb265d12b404fa28e6b5a84542117
Author: Jürg Billeter <j bitron ch>
Date:   Mon Jul 27 17:34:31 2009 +0200

    Fix non-GObject interface properties in GObject classes
    
    Fixes bug 539658.

 codegen/valagobjectmodule.vala |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/codegen/valagobjectmodule.vala b/codegen/valagobjectmodule.vala
index 588e383..248d0fc 100644
--- a/codegen/valagobjectmodule.vala
+++ b/codegen/valagobjectmodule.vala
@@ -692,6 +692,14 @@ internal class Vala.GObjectModule : GTypeModule {
 			return false;
 		}
 
+		if (prop.base_interface_property != null) {
+			var iface = (Interface) prop.base_interface_property.parent_symbol;
+			if (!iface.is_subtype_of (gobject_type)) {
+				// implementing non-GObject property
+				return false;
+			}
+		}
+
 		return true;
 	}
 }