[tracker] libtracker-miner: Check directory updates before dropping mtime info

[Carlos Garnacho <carlosg src gnome org>]

commit d13912385704c41df20ad8a1101a93b15bdeda85
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Sep 25 12:26:33 2017 +0200

    libtracker-miner: Check directory updates before dropping mtime info
    
    file_notifier_traverse_tree() has the side effect of deleting mtime data,
    as it's presumably not needed anymore, except here. Check whether the
    directory was updated before notifying of the files inside, so we can
    thoroughly check for deleted content.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=786132

 src/libtracker-miner/tracker-file-notifier.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/src/libtracker-miner/tracker-file-notifier.c b/src/libtracker-miner/tracker-file-notifier.c
index 0f847c3..3afcc50 100644
--- a/src/libtracker-miner/tracker-file-notifier.c
+++ b/src/libtracker-miner/tracker-file-notifier.c
@@ -868,6 +868,7 @@ sparql_files_query_cb (GObject      *object,
        TrackerFileNotifierPrivate *priv;
        TrackerFileNotifier *notifier;
        TrackerSparqlCursor *cursor;
+       gboolean directory_modified;
        GError *error = NULL;
        GFile *directory;
        guint flags;
@@ -890,13 +891,15 @@ sparql_files_query_cb (GObject      *object,
                g_object_unref (cursor);
        }
 
-       file_notifier_traverse_tree (notifier, data->max_depth);
        directory = priv->current_index_root->current_dir;
        flags = priv->current_index_root->flags;
+       directory_modified = file_notifier_is_directory_modified (notifier, directory);
+
+       file_notifier_traverse_tree (notifier, data->max_depth);
 
        if ((flags & TRACKER_DIRECTORY_FLAG_CHECK_DELETED) != 0 ||
            priv->current_index_root->current_dir_content_filtered ||
-           file_notifier_is_directory_modified (notifier, directory)) {
+           directory_modified) {
                /* The directory has updated its mtime, this means something
                 * was either added or removed in the mean time. Crawling
                 * will always find all newly added files. But still, we