[evolution-data-server] Do not use uninitialized variable

[Milan Crha <mcrha src gnome org>]

commit 3a76b8ec03ad56a74b551b0ffa66bb0e798c5d39
Author: Milan Crha <mcrha redhat com>
Date:   Fri Jul 9 09:32:33 2010 +0200

    Do not use uninitialized variable

 calendar/libedata-cal/e-cal-backend-cache.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/calendar/libedata-cal/e-cal-backend-cache.c b/calendar/libedata-cal/e-cal-backend-cache.c
index 646c8b2..2e418ef 100644
--- a/calendar/libedata-cal/e-cal-backend-cache.c
+++ b/calendar/libedata-cal/e-cal-backend-cache.c
@@ -69,6 +69,8 @@ get_filename_from_uri (const gchar *uri, ECalSourceType source_type)
 			break;
 	}
 
+	user_cache_dir = e_get_user_cache_dir ();
+
 	/* Mangle the URI to not contain invalid characters. */
 	mangled_uri = g_strdelimit (g_strdup (uri), ":/", '_');