[tracker] libtracker-miner: Protect against NULL thumbnailer

[Carlos Garnacho <carlosg src gnome org>]

commit 51fd82d823e966fe833c304b9f26880d8bfd16ac
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Feb 24 16:40:30 2014 +0100

    libtracker-miner: Protect against NULL thumbnailer
    
    If the service initialization fails, a NULL object will be returned,
    so check for that before attempting to communicate with the thumbnailer.

 src/libtracker-miner/tracker-miner-fs.c |   18 +++++++++++-------
 1 files changed, 11 insertions(+), 7 deletions(-)
---
diff --git a/src/libtracker-miner/tracker-miner-fs.c b/src/libtracker-miner/tracker-miner-fs.c
index 23f72e9..abf0873 100644
--- a/src/libtracker-miner/tracker-miner-fs.c
+++ b/src/libtracker-miner/tracker-miner-fs.c
@@ -1360,7 +1360,8 @@ item_remove (TrackerMinerFS *fs,
        if (!only_children) {
                flags = TRACKER_BULK_MATCH_EQUALS;
        } else {
-               tracker_thumbnailer_remove_add (fs->priv->thumbnailer, uri, NULL);
+               if (fs->priv->thumbnailer)
+                       tracker_thumbnailer_remove_add (fs->priv->thumbnailer, uri, NULL);
                tracker_media_art_queue_remove (uri, NULL);
        }
 
@@ -1556,8 +1557,9 @@ item_update_children_uri_cb (GObject      *object,
                                                "} ",
                                                child_urn, child_urn, child_uri);
 
-                       tracker_thumbnailer_move_add (fs->priv->thumbnailer,
-                                                     child_source_uri, child_mime, child_uri);
+                       if (fs->priv->thunbnailer)
+                               tracker_thumbnailer_move_add (fs->priv->thumbnailer,
+                                                             child_source_uri, child_mime, child_uri);
 
                        g_free (child_uri);
                }
@@ -1644,9 +1646,10 @@ item_move (TrackerMinerFS *fs,
                 source_uri,
                 uri);
 
-       tracker_thumbnailer_move_add (fs->priv->thumbnailer, source_uri,
-                                     g_file_info_get_content_type (file_info),
-                                     uri);
+       if (fs->priv->thumbnailer)
+               tracker_thumbnailer_move_add (fs->priv->thumbnailer, source_uri,
+                                             g_file_info_get_content_type (file_info),
+                                             uri);
 
        sparql = g_string_new ("");
 
@@ -2281,7 +2284,8 @@ item_queue_handlers_cb (gpointer user_data)
                                /* Print stats and signal finished */
                                process_stop (fs);
 
-                               tracker_thumbnailer_send (fs->priv->thumbnailer);
+                               if (fs->priv->thumbnailer)
+                                       tracker_thumbnailer_send (fs->priv->thumbnailer);
                                tracker_media_art_queue_empty (tracker_miner_get_connection (TRACKER_MINER 
(fs)));
                        } else {
                                /* Flush any possible pending update here */