[gtk/wip/ebassi/constraint-layout] Use the right GValue getter for GtkConstraintGuide:strength

[Emmanuele Bassi <ebassi src gnome org>]

commit b435dc436698c89cfc2a487a28b2fb6208628941
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Jul 1 18:02:19 2019 +0100

    Use the right GValue getter for GtkConstraintGuide:strength
    
    The property is defined as an enum.
    
    This fixes the defaultvalue and notify tests.

 gtk/gtkconstraintguide.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkconstraintguide.c b/gtk/gtkconstraintguide.c
index 3159e905ee..de7bb03499 100644
--- a/gtk/gtkconstraintguide.c
+++ b/gtk/gtkconstraintguide.c
@@ -307,7 +307,7 @@ gtk_constraint_guide_get_property (GObject    *gobject,
       break;
 
     case PROP_STRENGTH:
-      g_value_set_int (value, self->strength);
+      g_value_set_enum (value, self->strength);
       break;
 
     case PROP_NAME: