[gnome-builder] editor-view: update addins for stack when created

[Christian Hergert <chergert src gnome org>]

commit b61ab93c559fd290f7137e97891f5734881dde0d
Author: Christian Hergert <chergert redhat com>
Date:   Sun Sep 3 23:53:24 2017 -0700

    editor-view: update addins for stack when created

 libide/editor/ide-editor-view.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/libide/editor/ide-editor-view.c b/libide/editor/ide-editor-view.c
index bb1c9b5..0512cfa 100644
--- a/libide/editor/ide-editor-view.c
+++ b/libide/editor/ide-editor-view.c
@@ -407,6 +407,18 @@ ide_editor_view_addin_added (IdeExtensionSetAdapter *set,
   g_assert (IDE_IS_EDITOR_VIEW (self));
 
   ide_editor_view_addin_load (addin, self);
+
+  /*
+   * Notify of the current stack, but refetch the stack pointer just
+   * to be sure we aren't re-using an old pointer in case we're racing
+   * with a finalizer.
+   */
+  if (self->last_stack_ptr != NULL)
+    {
+      GtkWidget *stack = gtk_widget_get_ancestor (GTK_WIDGET (self), IDE_TYPE_LAYOUT_STACK);
+      if (stack != NULL)
+        ide_editor_view_addin_stack_set (addin, IDE_LAYOUT_STACK (stack));
+    }
 }
 
 static void