[gtk+] broadway: Use correct type in assignment

[Emmanuele Bassi <ebassi src gnome org>]

commit f1ef42287148f42a733fcc4b63d32955aefea633
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Thu Dec 21 18:42:26 2017 +0000

    broadway: Use correct type in assignment
    
    The new type propagation for g_object_ref() is raising a compiler
    warning for an assignment with a different type.

 gdk/broadway/broadway-server.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/broadway/broadway-server.c b/gdk/broadway/broadway-server.c
index c3e0b34..951c703 100644
--- a/gdk/broadway/broadway-server.c
+++ b/gdk/broadway/broadway-server.c
@@ -1289,7 +1289,7 @@ handle_incoming_connection (GSocketService    *service,
     }
   else
     {
-      request->connection = g_object_ref (connection);
+      request->connection = G_IO_STREAM (g_object_ref (connection));
     }
 
   in = g_io_stream_get_input_stream (request->connection);