[gnome-builder] flatpak: avoid multiple return values for a task

[Christian Hergert <chergert src gnome org>]

commit 0b7e3f8853591b6116d165886d7ff7c723691572
Author: Christian Hergert <chergert redhat com>
Date:   Mon Jan 14 10:29:13 2019 -0800

    flatpak: avoid multiple return values for a task
    
    Also protects against release on propagate of task state/source object.

 src/plugins/flatpak/gbp-flatpak-runtime-provider.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/plugins/flatpak/gbp-flatpak-runtime-provider.c 
b/src/plugins/flatpak/gbp-flatpak-runtime-provider.c
index f9fee0a6d..16931512a 100644
--- a/src/plugins/flatpak/gbp-flatpak-runtime-provider.c
+++ b/src/plugins/flatpak/gbp-flatpak-runtime-provider.c
@@ -557,6 +557,9 @@ gbp_flatpak_runtime_provider_bootstrap_cb (GObject      *object,
   g_assert (IDE_IS_TASK (task));
   g_assert (G_IS_ASYNC_RESULT (result));
 
+  if (ide_task_had_error (task))
+    return;
+
   self = ide_task_get_source_object (task);
   state = ide_task_get_task_data (task);