[gssdp] client: Proper type for message-received signal

[Jens Georg <jensgeorg src gnome org>]

commit 96f3a529c1a2c3ff4f4dfba2f232cff50d178901
Author: Jens Georg <mail jensge org>
Date:   Tue Dec 11 14:32:29 2018 +0100

    client: Proper type for message-received signal
    
    Switch from generic gpointer to SoupMessageHeaders

 libgssdp/gssdp-client.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/libgssdp/gssdp-client.c b/libgssdp/gssdp-client.c
index 87f6abd..06f26da 100644
--- a/libgssdp/gssdp-client.c
+++ b/libgssdp/gssdp-client.c
@@ -655,7 +655,7 @@ gssdp_client_class_init (GSSDPClientClass *klass)
                               G_TYPE_STRING | G_SIGNAL_TYPE_STATIC_SCOPE,
                               G_TYPE_UINT,
                               G_TYPE_INT,
-                              G_TYPE_POINTER);
+                              soup_message_headers_get_type());
 }
 
 /**