[unique] message: Bail out of get_text_plain if len == 0

[Emmanuele Bassi <ebassi src gnome org>]

commit c961b2962abcf49b6cdbf841ca4ecf33c135eb1f
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Sun Mar 27 09:46:53 2011 +0100

    message: Bail out of get_text_plain if len == 0
    
    Otherwise it'll segfault in g_utf8_validate().
    
    https://bugzilla.gnome.org/show_bug.cgi?id=634182

 unique/uniquemessage.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/unique/uniquemessage.c b/unique/uniquemessage.c
index a938029..bbe7338 100644
--- a/unique/uniquemessage.c
+++ b/unique/uniquemessage.c
@@ -300,6 +300,9 @@ message_data_get_text_plain (UniqueMessageData *message_data)
   gsize len;
   GError *error = NULL;
 
+  if (message_data->length == 0)
+    return NULL;
+
   str = g_strdup ((gchar *) message_data->data);
   len = message_data->length;