[gnome-builder] diagnostician: steal the pointer instead of ref

[Christian Hergert <chergert src gnome org>]

commit fd701a96b8f7c3e1c3c4efe8425c66ed83d3a90e
Author: Christian Hergert <chergert redhat com>
Date:   Thu May 12 17:07:02 2016 +0300

    diagnostician: steal the pointer instead of ref

 libide/ide-diagnostician.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libide/ide-diagnostician.c b/libide/ide-diagnostician.c
index bdb267c..e5a5e84 100644
--- a/libide/ide-diagnostician.c
+++ b/libide/ide-diagnostician.c
@@ -109,7 +109,7 @@ maybe_complete:
     g_task_return_error (task, g_error_copy (error));
   else if (state->active == 0)
     g_task_return_pointer (task,
-                           ide_diagnostics_ref (state->diagnostics),
+                           g_steal_pointer (&state->diagnostics),
                            (GDestroyNotify)ide_diagnostics_unref);
 }