[gnome-builder] object: add fallback to ensure we have a valid GError

[Christian Hergert <chergert src gnome org>]

commit 2504cd24acdd8bd25cf26eed62687fbc707fb9cc
Author: Christian Hergert <chergert redhat com>
Date:   Mon Jun 19 17:58:51 2017 -0700

    object: add fallback to ensure we have a valid GError

 libide/ide-object.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/libide/ide-object.c b/libide/ide-object.c
index 8e84158..56aeaad 100644
--- a/libide/ide-object.c
+++ b/libide/ide-object.c
@@ -367,6 +367,12 @@ extension_init_cb (GObject      *object,
 
   if (!g_async_initable_init_finish (initable, result, &error))
     {
+      if (error == NULL)
+        error = g_error_new (G_IO_ERROR,
+                             G_IO_ERROR_FAILED,
+                             "Unknown error while initializing %s",
+                             G_OBJECT_TYPE_NAME (initable));
+
       IDE_TRACE_MSG ("extension for %s failed to initialize: %s",
                      G_OBJECT_TYPE_NAME (initable), error->message);