Make GSocketSourceFunc return the GSocket

This is very useful when you have multiple sockets with sources.

gio/gasynchelper.h

@@ -24,6 +24,7 @@
 #define __G_ASYNC_HELPER_H__
 
 #include <gio/gio.h>
+#include <glib-object.h>
 
 G_BEGIN_DECLS
 
@@ -37,6 +38,9 @@ typedef struct
 typedef gboolean (*GFDSourceFunc) (gpointer     user_data,
 				   GIOCondition condition,
 				   int          fd);
+typedef gboolean (*GFDSourceObjectFunc) (GObject *object,
+					 GIOCondition condition,
+					 gpointer     user_data);
 
 void     _g_queue_async_result (GAsyncResultData *result,
 				gpointer         async_object,
@@ -44,9 +48,13 @@ void     _g_queue_async_result (GAsyncResultData *result,
 				gpointer         user_data,
 				GSourceFunc      source_func);
 
-GSource *_g_fd_source_new      (int              fd,
-				gushort          events,
-				GCancellable    *cancellable);
+GSource *_g_fd_source_new_with_object (GObject      *object,
+				       int           fd,
+				       gushort       events,
+				       GCancellable *cancellable);
+GSource *_g_fd_source_new             (int           fd,
+				       gushort       events,
+				       GCancellable *cancellable);
 
 G_END_DECLS