[libgda] GI: add return value for copy of GdaAttributeManager

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit ff233ece73fbd415ec2600864bd323e7b5556d9c
Author: Daniel Espinosa <esodan gmail com>
Date:   Thu Jul 12 09:58:23 2018 -0500

    GI: add return value for copy of GdaAttributeManager

 libgda/gda-attributes-manager.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/libgda/gda-attributes-manager.c b/libgda/gda-attributes-manager.c
index a572b0fda..bd425e51b 100644
--- a/libgda/gda-attributes-manager.c
+++ b/libgda/gda-attributes-manager.c
@@ -373,6 +373,7 @@ att_mgr_copy (GdaAttributesManager* src) {
        cp->for_objects = src->for_objects;
        cp->signal_func = src->signal_func;
        cp->signal_data = src->signal_data;
+       return cp;
 }
 
 G_DEFINE_BOXED_TYPE(GdaAttributesManager, gda_attributes_manager, att_mgr_copy, gda_attributes_manager_free)