[gnome-builder] flatpak: get context from workbench

[Christian Hergert <chergert src gnome org>]

commit 24dea04d8b8503005c467640fe4b7616a2e7ed66
Author: Christian Hergert <chergert redhat com>
Date:   Mon Nov 20 14:16:09 2017 -0800

    flatpak: get context from workbench
    
    The transfer manager is not an IdeObject any longer, as it is attached to
    the IdeApplication. So we need to get a context from somewhere else.

 src/plugins/flatpak/gbp-flatpak-workbench-addin.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/src/plugins/flatpak/gbp-flatpak-workbench-addin.c 
b/src/plugins/flatpak/gbp-flatpak-workbench-addin.c
index 131c5a7..8002cc4 100644
--- a/src/plugins/flatpak/gbp-flatpak-workbench-addin.c
+++ b/src/plugins/flatpak/gbp-flatpak-workbench-addin.c
@@ -176,6 +176,10 @@ gbp_flatpak_workbench_addin_install_cb (GObject      *object,
   g_assert (G_IS_ASYNC_RESULT (result));
   g_assert (GBP_IS_FLATPAK_WORKBENCH_ADDIN (self));
 
+  /* Make sure we've not been destroyed */
+  if (self->workbench == NULL)
+    IDE_EXIT;
+
   action = g_action_map_lookup_action (G_ACTION_MAP (self->actions), "install-flatpak-builder");
   g_simple_action_set_enabled (G_SIMPLE_ACTION (action), TRUE);
 
@@ -186,7 +190,7 @@ gbp_flatpak_workbench_addin_install_cb (GObject      *object,
     }
   else
     {
-      IdeContext *context = ide_object_get_context (IDE_OBJECT (manager));
+      IdeContext *context = ide_workbench_get_context (self->workbench);
       IdeConfigurationManager *config_manager = ide_context_get_configuration_manager (context);
 
       /* TODO: It would be nice to have a cleaner way to re-setup the pipeline