[evolution-data-server/gnome-3-2] Workaround possible crash in imap_body_decode()

[Milan Crha <mcrha src gnome org>]

commit 5ed2409de763f7f4b96941298739aba811cd4ab5
Author: Milan Crha <mcrha redhat com>
Date:   Mon Oct 10 10:57:18 2011 +0200

    Workaround possible crash in imap_body_decode()

 camel/providers/imap/camel-imap-utils.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/camel/providers/imap/camel-imap-utils.c b/camel/providers/imap/camel-imap-utils.c
index 5c47f3a..497f9d2 100644
--- a/camel/providers/imap/camel-imap-utils.c
+++ b/camel/providers/imap/camel-imap-utils.c
@@ -977,7 +977,8 @@ imap_body_decode (const gchar **in,
 		}
 
 		camel_strdown (type);
-		camel_strdown (subtype);
+		if (subtype)
+			camel_strdown (subtype);
 		ctype = camel_content_type_new (type, subtype);
 		g_free (subtype);
 		g_free (type);