codegen: Fix is_reference_counting() result for interfaces

Fixes a regression introduced by commit 5956bf5074d4508c.

Fixes bug 661620.

diff --git a/codegen/valaccodebasemodule.vala b/codegen/valaccodebasemodule.vala
index a21c4d4d7f3c3b1f56ceb94278bae634f004acfb..41c0c52d78ad66e145ee6e8f0a726cc1492c2b51 100644 (file)
--- a/codegen/valaccodebasemodule.vala
+++ b/codegen/valaccodebasemodule.vala
@@ -5580,7 +5580,13 @@ public abstract class Vala.CCodeBaseModule : CodeGenerator {
        }
 
        public static bool is_reference_counting (TypeSymbol sym) {
-               return get_ccode_ref_function (sym) != null;
+               if (sym is Class) {
+                       return get_ccode_ref_function (sym) != null;
+               } else if (sym is Interface) {
+                       return true;
+               } else {
+                       return false;
+               }
        }
 
        public static bool get_ccode_ref_function_void (Class cl) {