item-view/tooltip: Add missing breaks in set_property switch statements

https://bugzilla.redhat.com/show_bug.cgi?id=919026

mx/mx-item-view.c

@@ -110,6 +110,7 @@ mx_item_view_set_property (GObject      *object,
     case PROP_MODEL:
       mx_item_view_set_model ((MxItemView*) object,
                               (ClutterModel*) g_value_get_object (value));
+      break;
     case PROP_ITEM_TYPE:
       mx_item_view_set_item_type ((MxItemView*) object,
                                   g_value_get_gtype (value));

mx/mx-tooltip.c

@@ -126,6 +126,7 @@ mx_tooltip_set_property (GObject      *gobject,
 
     case PROP_TIP_AREA:
       mx_tooltip_set_tip_area (tooltip, g_value_get_boxed (value));
+      break;
 
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);