[evolution] Correct type of ECalDataModel::timezone property

[Milan Crha <mcrha src gnome org>]

commit 15a5bcaf5de4ff85648918d4226142b55d88bed0
Author: Milan Crha <mcrha redhat com>
Date:   Fri May 17 23:34:34 2019 +0200

    Correct type of ECalDataModel::timezone property

 src/calendar/gui/e-cal-data-model.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/src/calendar/gui/e-cal-data-model.c b/src/calendar/gui/e-cal-data-model.c
index 82c7f7cc45..81d45bd796 100644
--- a/src/calendar/gui/e-cal-data-model.c
+++ b/src/calendar/gui/e-cal-data-model.c
@@ -1986,7 +1986,7 @@ cal_data_model_set_property (GObject *object,
                case PROP_TIMEZONE:
                        e_cal_data_model_set_timezone (
                                E_CAL_DATA_MODEL (object),
-                               g_value_get_pointer (value));
+                               g_value_get_object (value));
                        return;
 
                case PROP_SKIP_CANCELLED:
@@ -2014,7 +2014,7 @@ cal_data_model_get_property (GObject *object,
                        return;
 
                case PROP_TIMEZONE:
-                       g_value_set_pointer (
+                       g_value_set_object (
                                value,
                                e_cal_data_model_get_timezone (
                                E_CAL_DATA_MODEL (object)));
@@ -2088,10 +2088,11 @@ e_cal_data_model_class_init (ECalDataModelClass *class)
        g_object_class_install_property (
                object_class,
                PROP_TIMEZONE,
-               g_param_spec_pointer (
+               g_param_spec_object (
                        "timezone",
                        "Time Zone",
                        NULL,
+                       I_CAL_TYPE_TIMEZONE,
                        G_PARAM_READWRITE));
 
        g_object_class_install_property (