[tracker] tracker-extract: Handle NULL modules

[Carlos Garnacho <carlosg src gnome org>]

commit 82656fec6b118731b0d49ea763c836e56c9af58a
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Aug 4 18:49:57 2015 +0200

    tracker-extract: Handle NULL modules
    
    This will be necessary when we have an internal dummy function.

 src/tracker-extract/tracker-extract.c |   13 ++++++++++---
 1 files changed, 10 insertions(+), 3 deletions(-)
---
diff --git a/src/tracker-extract/tracker-extract.c b/src/tracker-extract/tracker-extract.c
index 6a2fec9..4e6a7eb 100644
--- a/src/tracker-extract/tracker-extract.c
+++ b/src/tracker-extract/tracker-extract.c
@@ -323,7 +323,10 @@ get_file_metadata (TrackerExtractTask  *task,
                if (task->cur_func) {
                        TrackerSparqlBuilder *statements;
 
-                       g_debug ("Using %s...", g_module_name (task->cur_module));
+                       g_debug ("Using %s...",
+                                task->cur_module ?
+                                g_module_name (task->cur_module) :
+                                "Dummy extraction");
 
                        success = (task->cur_func) (info);
 
@@ -466,6 +469,10 @@ filter_module (TrackerExtract *extract,
        gchar *module_basename, *filter_name;
        gboolean filter;
 
+       if (!module) {
+               return FALSE;
+       }
+
        priv = TRACKER_EXTRACT_GET_PRIVATE (extract);
 
        if (!priv->force_module) {
@@ -620,7 +627,7 @@ dispatch_task_cb (TrackerExtractTask *task)
 
        task->cur_module = module = tracker_mimetype_info_get_module (task->mimetype_handlers, 
&task->cur_func, &thread_awareness);
 
-       if (!module || !task->cur_func) {
+       if (!task->cur_func) {
                g_warning ("Discarding task, no module able to handle '%s'", task->file);
                priv->unhandled_count++;
                extract_task_free (task);
@@ -797,7 +804,7 @@ tracker_extract_get_metadata_by_cmdline (TrackerExtract *object,
        task->mimetype_handlers = tracker_extract_module_manager_get_mimetype_handlers (task->mimetype);
        task->cur_module = tracker_mimetype_info_get_module (task->mimetype_handlers, &task->cur_func, NULL);
 
-       while (task->cur_module && task->cur_func) {
+       while (task->cur_func) {
                if (!filter_module (object, task->cur_module) &&
                    get_file_metadata (task, &info)) {
                        const gchar *preupdate_str, *postupdate_str, *statements_str, *where;