[evolution-data-server] ECalBackendCalDAV: Fix a "pointer-sign" compiler warning.

[Matthew Barnes <mbarnes src gnome org>]

commit 34038e9275f476c4e79405937f8a6e7533e92434
Author: Matthew Barnes <mbarnes redhat com>
Date:   Sat Mar 3 11:34:13 2012 -0500

    ECalBackendCalDAV: Fix a "pointer-sign" compiler warning.

 calendar/backends/caldav/e-cal-backend-caldav.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/calendar/backends/caldav/e-cal-backend-caldav.c b/calendar/backends/caldav/e-cal-backend-caldav.c
index 323d228..caf0b72 100644
--- a/calendar/backends/caldav/e-cal-backend-caldav.c
+++ b/calendar/backends/caldav/e-cal-backend-caldav.c
@@ -3055,7 +3055,7 @@ convert_to_inline_attachment (ECalBackendCalDAV *cbdav,
 			 * be embedded in a soap message
 			 */
 			encoded = g_base64_encode ((guchar *) content, len);
-			attach = icalattach_new_from_data (encoded, NULL, NULL);
+			attach = icalattach_new_from_data ((guchar *) encoded, NULL, NULL);
 			g_free (content);
 			g_free (encoded);