[evolution-ews] Fix "may be used uninitialized" compilation errors

[Pavel Ocheretny <pocheretny src gnome org>]

commit 942d752ee7bbe6edf027a672e8236a69d58868e4
Author: Pavel Ocheretny <pavel ocheretny intel com>
Date:   Thu Aug 25 14:54:35 2011 +0300

    Fix "may be used uninitialized" compilation errors

 src/calendar/e-cal-backend-ews.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/calendar/e-cal-backend-ews.c b/src/calendar/e-cal-backend-ews.c
index ea0c407..1ec5400 100644
--- a/src/calendar/e-cal-backend-ews.c
+++ b/src/calendar/e-cal-backend-ews.c
@@ -1620,12 +1620,12 @@ ews_cal_modify_object_cb (GObject *object, GAsyncResult *res, gpointer user_data
 	ECalBackendEws *cbews = modify_data->cbews;
 	ECalBackendEwsPrivate *priv = cbews->priv;
 	GError *error = NULL;
-	gchar *comp_str, *comp_str_old;
+	gchar *comp_str = NULL, *comp_str_old = NULL;
 	GSList *ids = NULL;
 	const EwsId *item_id;
-	icalproperty *icalprop;
+	icalproperty *icalprop = NULL;
 	icalcomponent *icalcomp;
-	ECalComponentId *id;
+	ECalComponentId *id = NULL;
 	const gchar *x_name;
 
 	if (!e_ews_connection_update_items_finish (cnc, res, &ids, &error)) {