[gnome-online-accounts/gnome-3-26] kerberos: Don't leak the GcrPrompt

[Debarshi Ray <debarshir src gnome org>]

commit d602bb918936ba8ddcc884df4cbbd50166201d6a
Author: Debarshi Ray <debarshir gnome org>
Date:   Tue Nov 7 15:59:19 2017 +0100

    kerberos: Don't leak the GcrPrompt

 src/goabackend/goakerberosprovider.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/src/goabackend/goakerberosprovider.c b/src/goabackend/goakerberosprovider.c
index 79f1910..3fb197f 100644
--- a/src/goabackend/goakerberosprovider.c
+++ b/src/goabackend/goakerberosprovider.c
@@ -956,7 +956,7 @@ on_system_prompt_open_for_initial_sign_in (GcrSystemPrompt     *system_prompt,
                                            GTask               *operation_result)
 {
   GCancellable *cancellable;
-  GcrPrompt    *prompt;
+  GcrPrompt    *prompt = NULL;
   GError       *error;
 
   cancellable = g_task_get_cancellable (operation_result);
@@ -967,8 +967,7 @@ on_system_prompt_open_for_initial_sign_in (GcrSystemPrompt     *system_prompt,
     {
       g_task_return_error (operation_result, error);
       g_object_unref (operation_result);
-
-      return;
+      goto out;
     }
 
   gcr_prompt_set_title (prompt, _("Log In to Realm"));
@@ -980,6 +979,9 @@ on_system_prompt_open_for_initial_sign_in (GcrSystemPrompt     *system_prompt,
                              (GAsyncReadyCallback)
                              on_system_prompt_answered_for_initial_sign_in,
                              operation_result);
+
+ out:
+  g_clear_object (&prompt);
 }
 
 static void