[tracker] libtracker-miner: Decorator causes crash on _update_array_finish() failures.

[Martyn James Russell <mr src gnome org>]

commit a1efdb7691542c4a871b3bd4d0aefe6aa34012f8
Author: Martyn Russell <martyn lanedo com>
Date:   Tue Apr 22 11:12:52 2014 +0100

    libtracker-miner: Decorator causes crash on _update_array_finish() failures.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=728546

 src/libtracker-miner/tracker-decorator.c |   19 +++++++++++--------
 1 files changed, 11 insertions(+), 8 deletions(-)
---
diff --git a/src/libtracker-miner/tracker-decorator.c b/src/libtracker-miner/tracker-decorator.c
index 760eb97..e9c38c5 100644
--- a/src/libtracker-miner/tracker-decorator.c
+++ b/src/libtracker-miner/tracker-decorator.c
@@ -328,19 +328,22 @@ decorator_commit_cb (GObject      *object,
                g_warning ("There was an error pushing metadata: %s\n", error->message);
        }
 
-       for (i = 0; i < errors->len; i++) {
-               GError *child_error;
+       if (errors) {
+               for (i = 0; i < errors->len; i++) {
+                       GError *child_error;
 
-               child_error = g_ptr_array_index (errors, i);
+                       child_error = g_ptr_array_index (errors, i);
 
-               if (child_error) {
-                       g_warning ("Task %d, error: %s", i, child_error->message);
-                       g_warning ("Sparql update was:\n%s\n",
-                                  (gchar *) g_ptr_array_index (sparql, i));
+                       if (child_error) {
+                               g_warning ("Task %d, error: %s", i, child_error->message);
+                               g_warning ("Sparql update was:\n%s\n",
+                                          (gchar *) g_ptr_array_index (sparql, i));
+                       }
                }
+
+               g_ptr_array_unref (errors);
        }
 
-       g_ptr_array_unref (errors);
        g_ptr_array_unref (sparql);
 }