[tracker/tracker-1.2] libtracker-extract: fix logic in guarantee title from file

[Tim Lunn <timl src gnome org>]

commit 2f2cad8502b38d9cc0b0d2a53906b4a2e9cdeca2
Author: Tim Lunn <tim feathertop org>
Date:   Mon Dec 29 09:56:19 2014 +1100

    libtracker-extract: fix logic in guarantee title from file
    
    https://bugzilla.gnome.org/show_bug.cgi?id=742035

 src/libtracker-extract/tracker-guarantee.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/libtracker-extract/tracker-guarantee.c b/src/libtracker-extract/tracker-guarantee.c
index 99354e5..f43a4e6 100644
--- a/src/libtracker-extract/tracker-guarantee.c
+++ b/src/libtracker-extract/tracker-guarantee.c
@@ -118,7 +118,7 @@ tracker_guarantee_title_from_file (TrackerSparqlBuilder  *metadata,
 
                value = get_title_from_file (uri);
 
-               if (!value && value[0] != '\0') {
+               if (value && value[0] != '\0') {
                        tracker_sparql_builder_object_unvalidated (metadata, value);
                } else {
                        success = FALSE;