[gnome-calendar] Fix build against new eds

[Michael Catanzaro <mcatanzaro src gnome org>]

commit e6d248699ead1c60e487c4adfc2c7536a0cc6cf8
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Mon Jan 14 12:47:24 2019 -0600

    Fix build against new eds
    
    This build failure was surfaced by
    https://gitlab.gnome.org/GNOME/evolution-data-server/issues/73, but
    gnome-calendar is at fault for defining autoptrs for types it doesn't
    control.

 src/gcal-utils.h | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/gcal-utils.h b/src/gcal-utils.h
index af0cf594..74345671 100644
--- a/src/gcal-utils.h
+++ b/src/gcal-utils.h
@@ -34,9 +34,12 @@
 #define gcal_clear_datetime(dt) g_clear_pointer (dt, g_date_time_unref)
 #define gcal_clear_timeout(pp) { if (pp && *pp) { g_source_remove (*pp); *pp = 0; } }
 
+#if !EDS_CHECK_VERSION (3, 31, 90)
 /* Add autoptr support for libecal */
 G_DEFINE_AUTOPTR_CLEANUP_FUNC (ECalComponent, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC (ESource, g_object_unref)
+#endif
+
 G_DEFINE_AUTOPTR_CLEANUP_FUNC (GWeatherLocation, gweather_location_unref)
 
 GType                icaltime_get_type                           (void)            G_GNUC_CONST;