[tracker] examples: Drop unneeded g_object_unref() call

[Carlos Garnacho <carlosg src gnome org>]

commit f201cf174b5a7ccbd61bb030c5e7ca31dd7f5a2b
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sat Jan 28 12:38:45 2017 +0100

    examples: Drop unneeded g_object_unref() call
    
    The cursor will be NULL in the error paths, no need to try to unref it.
    
    Coverity ID: 1188470

 examples/libtracker-sparql/async-connection.c |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)
---
diff --git a/examples/libtracker-sparql/async-connection.c b/examples/libtracker-sparql/async-connection.c
index 5c4541a..c18608c 100644
--- a/examples/libtracker-sparql/async-connection.c
+++ b/examples/libtracker-sparql/async-connection.c
@@ -107,11 +107,6 @@ query_cb (GObject      *object,
                                                  md);
        } else {
                g_critical ("Could not run query: %s", error->message);
-
-               if (cursor) {
-                       g_object_unref (cursor);
-               }
-
                g_error_free (error);
                g_main_loop_quit (md->loop);
        }