[tracker] tracker-extract: Plug leaks in EPUB extractor

[Carlos Garnacho <carlosg src gnome org>]

commit e9d7bf40e69ef51680f1ce77d43d6cf6a28a3764
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Nov 27 19:54:02 2016 +0100

    tracker-extract: Plug leaks in EPUB extractor
    
    Introduced during the TrackerResource work.

 src/tracker-extract/tracker-extract-epub.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/tracker-extract/tracker-extract-epub.c b/src/tracker-extract/tracker-extract-epub.c
index 4f7b5cf..0827998 100644
--- a/src/tracker-extract/tracker-extract-epub.c
+++ b/src/tracker-extract/tracker-extract-epub.c
@@ -278,6 +278,7 @@ opf_xml_text_handler (GMarkupParseContext   *context,
                        tracker_resource_set_string (publisher, "nco:fullname", text);
 
                        tracker_resource_set_relation (data->resource, "nco:publisher", publisher);
+                       g_object_unref (publisher);
 
                        data->has_publisher = TRUE;
                }
@@ -424,6 +425,8 @@ opf_xml_text_handler (GMarkupParseContext   *context,
                }
 
                tracker_resource_set_relation (data->resource, "nco:creator", contact);
+               g_clear_object (&artist);
+               g_object_unref (contact);
 
                break;
        }