sms: add support for message class

We need to redefine the message class property to int since class
0 is a valid message class.  Thus -1 now means "unspecified class".

1 files changed, 3 insertions, 3 deletions

diff --git a/libmm-glib/mm-sms.c b/libmm-glib/mm-sms.c
index a69b5dc7..82290218 100644
--- a/libmm-glib/mm-sms.c
+++ b/libmm-glib/mm-sms.c
@@ -445,12 +445,12 @@ mm_sms_get_validity_relative (MMSms *self)
  *
  * Gets the 3GPP message class of the SMS.
  *
- * Returns: the message class.
+ * Returns: the message class, or -1 for invalid/unset class.
  */
-guint
+gint
 mm_sms_get_class (MMSms *self)
 {
-    g_return_val_if_fail (MM_IS_SMS (self), 0);
+    g_return_val_if_fail (MM_IS_SMS (self), -1);
 
     return mm_gdbus_sms_get_class (MM_GDBUS_SMS (self));
 }