[gupnp-tools] av-cp: Add missing free

[Jens Georg <jensgeorg src gnome org>]

commit dfe463abc27ca6446de5d8e8a2f5e9917aa1a66e
Author: Jens Georg <mail jensge org>
Date:   Sun Apr 3 18:40:18 2016 +0200

    av-cp: Add missing free
    
    Signed-off-by: Jens Georg <mail jensge org>

 src/av-cp/server-device.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/av-cp/server-device.c b/src/av-cp/server-device.c
index 73ed478..2a89e42 100644
--- a/src/av-cp/server-device.c
+++ b/src/av-cp/server-device.c
@@ -158,7 +158,7 @@ av_cp_media_server_on_get_sort_caps (GUPnPServiceProxy *proxy,
                 g_warning ("Failed to get sort caps from server: %s",
                            error->message);
                 g_error_free (error);
-        } else {
+        } else if (sort_caps != NULL) {
                 GString *default_sort_order = g_string_new (NULL);
                 if (strstr (sort_caps, "upnp:class") != NULL) {
                         g_string_append (default_sort_order, "+upnp:class,");
@@ -170,6 +170,8 @@ av_cp_media_server_on_get_sort_caps (GUPnPServiceProxy *proxy,
 
                 self->priv->default_sort_order =
                                 g_string_free (default_sort_order, FALSE);
+
+                g_free (sort_caps);
         }
 
         self->priv->state = INITIALIZED;