[gssdp] socket-source: Make index int

[Jens Georg <jensgeorg src gnome org>]

commit 7edd9eb3313c934483d8d15f8218aa882f2063ab
Author: Jens Georg <mail jensge org>
Date:   Sun Nov 11 07:02:25 2018 +0100

    socket-source: Make index int
    
    This allows to use -1 as "unknown index"

 libgssdp/gssdp-socket-source.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/libgssdp/gssdp-socket-source.c b/libgssdp/gssdp-socket-source.c
index ae2dbf4..6ad895d 100644
--- a/libgssdp/gssdp-socket-source.c
+++ b/libgssdp/gssdp-socket-source.c
@@ -51,7 +51,7 @@ struct _GSSDPSocketSourcePrivate {
 
         GInetAddress         *address;
         char                 *device_name;
-        guint                 index;
+        gint                  index;
         guint                 ttl;
         guint                 port;
 };
@@ -140,7 +140,7 @@ gssdp_socket_source_set_property (GObject          *object,
                 priv->port = g_value_get_uint (value);
                 break;
         case PROP_IFA_IDX:
-                priv->index = g_value_get_uint (value);
+                priv->index = g_value_get_int (value);
                 break;
         default:
                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
@@ -523,12 +523,12 @@ gssdp_socket_source_class_init (GSSDPSocketSourceClass *klass)
         g_object_class_install_property
                 (object_class,
                  PROP_IFA_IDX,
-                 g_param_spec_uint
+                 g_param_spec_int
                         ("index",
                          "Interface index",
                          "Interface index of the network device",
-                         0, G_MAXUINT16,
-                         0,
+                         -1, G_MAXUINT16,
+                         -1,
                          G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY |
                          G_PARAM_STATIC_STRINGS));
 }