[gupnp] gupnp-service-proxy: remove subscription timeout on subscribe

[Jens Georg <jensgeorg src gnome org>]

commit 20eed980f64a0042e6bfc340c80d982ddf04ff1c
Author: Sven Neumann <neumann teufel de>
Date:   Wed Oct 8 13:03:08 2014 +0200

    gupnp-service-proxy: remove subscription timeout on subscribe
    
    We have seen crashes in subscription_expire() where user_data
    pointed to invalid memory. I do not see an obvious way how this
    can have happened, but it seems like a good idea to always
    remove the subscription timeout when sending a new subscription
    request.
    
    Signed-off-by: Sven Neumann <neumann teufel de>

 libgupnp/gupnp-service-proxy.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/libgupnp/gupnp-service-proxy.c b/libgupnp/gupnp-service-proxy.c
index 7a48ac9..015e926 100644
--- a/libgupnp/gupnp-service-proxy.c
+++ b/libgupnp/gupnp-service-proxy.c
@@ -2278,7 +2278,13 @@ subscribe (GUPnPServiceProxy *proxy)
         const char *server_url;
         char *sub_url, *delivery_url, *timeout;
 
-        context = gupnp_service_info_get_context (GUPNP_SERVICE_INFO (proxy));
+        /* Remove subscription timeout */
+        if (proxy->priv->subscription_timeout_src) {
+                g_source_destroy (proxy->priv->subscription_timeout_src);
+                proxy->priv->subscription_timeout_src = NULL;
+        }
+
+       context = gupnp_service_info_get_context (GUPNP_SERVICE_INFO (proxy));
 
         /* Create subscription message */
         sub_url = gupnp_service_info_get_event_subscription_url