[epiphany/mcatanzaro/bookmarks-export-error] Fix crash in ephy_bookmarks_manager_init()

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 3efb03ddb35d0a846aa7f30af860fdb9130166b8
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Mon Dec 16 15:00:33 2019 -0600

    Fix crash in ephy_bookmarks_manager_init()
    
    This is a regression from 3.34, we have 1341 reports of this in Fedora
    from 513 unique users. Problem is the error returned is uninitialized
    memory. Oops.
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1768089

 src/bookmarks/ephy-bookmarks-manager.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/bookmarks/ephy-bookmarks-manager.c b/src/bookmarks/ephy-bookmarks-manager.c
index efddec92f..09513dc8d 100644
--- a/src/bookmarks/ephy-bookmarks-manager.c
+++ b/src/bookmarks/ephy-bookmarks-manager.c
@@ -622,7 +622,7 @@ bookmarks_export_cb (GObject      *source_object,
 {
   EphyBookmarksManager *self = EPHY_BOOKMARKS_MANAGER (source_object);
   g_autoptr (GTask) task = user_data;
-  GError *error;
+  GError *error = NULL;
 
   if (!ephy_bookmarks_export_finish (self, result, &error)) {
     g_task_return_error (task, error);