[tracker] TrackerDecorator: Fix a compilator warning

[Xavier Claessens <xclaesse src gnome org>]

commit e0cd92d3a7c02df20a7b0c9813f9c06ef004f345
Author: Xavier Claessens <xavier claessens collabora co uk>
Date:   Thu Jan 30 13:59:50 2014 -0500

    TrackerDecorator: Fix a compilator warning
    
    gcc was thinking that strings could be used uninitialized.
    This fix the warning and simplify the code using a GPtrArray
    which is more natural for string arrays.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=719802

 src/libtracker-miner/tracker-decorator.c |   19 ++++++-------------
 1 files changed, 6 insertions(+), 13 deletions(-)
---
diff --git a/src/libtracker-miner/tracker-decorator.c b/src/libtracker-miner/tracker-decorator.c
index b45eeb8..1e6d364 100644
--- a/src/libtracker-miner/tracker-decorator.c
+++ b/src/libtracker-miner/tracker-decorator.c
@@ -472,7 +472,7 @@ tracker_decorator_validate_class_ids (TrackerDecorator *decorator,
 {
        TrackerSparqlConnection *sparql_conn;
        TrackerDecoratorPrivate *priv;
-       GArray *strings;
+       GPtrArray *strings;
        gint i = 0;
 
        priv = decorator->priv;
@@ -489,9 +489,8 @@ tracker_decorator_validate_class_ids (TrackerDecorator *decorator,
                g_array_remove_range (priv->class_name_ids, 0,
                                      priv->class_name_ids->len);
 
+       strings = g_ptr_array_new ();
        if (class_names) {
-               strings = g_array_new (TRUE, FALSE, sizeof (gchar *));
-
                while (class_names[i]) {
                        gchar *copy;
                        gint id;
@@ -500,23 +499,17 @@ tracker_decorator_validate_class_ids (TrackerDecorator *decorator,
 
                        if (id >= 0) {
                                copy = g_strdup (class_names[i]);
-                               g_array_append_val (strings, copy);
+                               g_ptr_array_add (strings, copy);
                                g_array_append_val (priv->class_name_ids, id);
                        }
 
                        i++;
                }
        }
+       g_ptr_array_add (strings, NULL);
 
-       if (priv->class_names) {
-               g_strfreev (priv->class_names);
-               priv->class_names = NULL;
-       }
-
-       if (priv->class_name_ids->len > 0)
-               priv->class_names = (GStrv) g_array_free (strings, FALSE);
-       else
-               g_array_free (strings, TRUE);
+       g_strfreev (priv->class_names);
+       priv->class_names = (GStrv) g_ptr_array_free (strings, FALSE);
 
        g_object_notify (G_OBJECT (decorator), "class-names");
 }