[tracker] libtracker-data: Initialize cursor variable

[Carlos Garnacho <carlosg src gnome org>]

commit ead23a7e0c76fb9b6174d598d939f644476538b9
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sat Aug 12 22:13:03 2017 +0200

    libtracker-data: Initialize cursor variable
    
    The variable may be used uninitialized, resulting on
    invalid reads.
    
    Spotted by Coverity (CID #1453480)

 src/libtracker-data/tracker-data-manager.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/libtracker-data/tracker-data-manager.c b/src/libtracker-data/tracker-data-manager.c
index 1375c1f..bfd4727 100644
--- a/src/libtracker-data/tracker-data-manager.c
+++ b/src/libtracker-data/tracker-data-manager.c
@@ -4749,7 +4749,7 @@ data_manager_check_perform_cleanup (TrackerDataManager *manager)
 {
        TrackerDBStatement *stmt;
        TrackerDBInterface *iface;
-       TrackerDBCursor *cursor;
+       TrackerDBCursor *cursor = NULL;
        guint count = 0;
 
        iface = tracker_db_manager_get_writable_db_interface (manager->db_manager);