Remove redundant code

There's no point in setting "l" to the next list member here as we
are done with it anyway. Remove redundant code and use local variables
to make it clear that the variable is not used afterwards.

libgupnp/gupnp-control-point.c

@@ -746,7 +746,6 @@ gupnp_control_point_resource_unavailable
 {
         GUPnPControlPoint *control_point;
         char *udn, *service_type;
-        GList *l, *cur_l;
 
         control_point = GUPNP_CONTROL_POINT (resource_browser);
 
@@ -756,7 +755,7 @@ gupnp_control_point_resource_unavailable
 
         /* Find proxy */
         if (service_type) {
-                l = find_service_node (control_point, udn, service_type);
+                GList *l = find_service_node (control_point, udn, service_type);
 
                 if (l) {
                         GUPnPServiceProxy *proxy;
@@ -764,12 +763,9 @@ gupnp_control_point_resource_unavailable
                         /* Remove proxy */
                         proxy = GUPNP_SERVICE_PROXY (l->data);
 
-                        cur_l = l;
-                        l = l->next;
-
                         control_point->priv->services =
                                 g_list_delete_link
-                                        (control_point->priv->services, cur_l);
+                                        (control_point->priv->services, l);
 
                         g_signal_emit (control_point,
                                        signals[SERVICE_PROXY_UNAVAILABLE],
@@ -779,7 +775,7 @@ gupnp_control_point_resource_unavailable
                         g_object_unref (proxy);
                 }
         } else {
-                l = find_device_node (control_point, udn);
+                GList *l = find_device_node (control_point, udn);
 
                 if (l) {
                         GUPnPDeviceProxy *proxy;
@@ -787,12 +783,9 @@ gupnp_control_point_resource_unavailable
                         /* Remove proxy */
                         proxy = GUPNP_DEVICE_PROXY (l->data);
 
-                        cur_l = l;
-                        l = l->next;
-
                         control_point->priv->devices =
                                  g_list_delete_link
-                                        (control_point->priv->devices, cur_l);
+                                        (control_point->priv->devices, l);
 
                         g_signal_emit (control_point,
                                        signals[DEVICE_PROXY_UNAVAILABLE],