[tracker/wip/GrssPerson] rss: use tracker_sparql_builder_object_blank_open()/close()

[Igor Gnatenko <ignatenko src gnome org>]

commit 7c021524adc57257a19bf0c20a7b68f0ae69377d
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sat Jul 18 17:10:01 2015 +0300

    rss: use tracker_sparql_builder_object_blank_open()/close()
    
    Tested-by: Igor Gnatenko <ignatenko src gnome org>

 src/miners/rss/tracker-miner-rss.c |   22 +++++++++-------------
 1 files changed, 9 insertions(+), 13 deletions(-)
---
diff --git a/src/miners/rss/tracker-miner-rss.c b/src/miners/rss/tracker-miner-rss.c
index 4f744e6..5b349ab 100644
--- a/src/miners/rss/tracker-miner-rss.c
+++ b/src/miners/rss/tracker-miner-rss.c
@@ -687,16 +687,6 @@ sparql_add_contact (TrackerSparqlBuilder *sparql,
        const gchar *name = grss_person_get_name (contact);
        const gchar *email = grss_person_get_email (contact);
        const gchar *uri = grss_person_get_uri (contact);
-       gchar *email_alias = g_strdup_printf ("%s-email", alias);
-
-       if (email != NULL) {
-               tracker_sparql_builder_subject (sparql, email_alias);
-               tracker_sparql_builder_predicate (sparql, "a");
-               tracker_sparql_builder_object (sparql, "nco:EmailAddress");
-
-               tracker_sparql_builder_predicate (sparql, "nco:emailAddress");
-               tracker_sparql_builder_object_unvalidated (sparql, email);
-       }
 
        tracker_sparql_builder_subject (sparql, alias);
        tracker_sparql_builder_predicate (sparql, "a");
@@ -707,15 +697,21 @@ sparql_add_contact (TrackerSparqlBuilder *sparql,
 
        if (email != NULL) {
                tracker_sparql_builder_predicate (sparql, "nco:hasEmailAddress");
-                tracker_sparql_builder_object (sparql, email_alias);
+
+               tracker_sparql_builder_object_blank_open (sparql);
+
+               tracker_sparql_builder_predicate (sparql, "a");
+               tracker_sparql_builder_object (sparql, "nco:EmailAddress");
+
+               tracker_sparql_builder_predicate (sparql, "nco:emailAddress");
+               tracker_sparql_builder_object_unvalidated (sparql, email);
+               tracker_sparql_builder_object_blank_close (sparql);
        }
 
        if (uri != NULL) {
                tracker_sparql_builder_predicate (sparql, "nco:websiteUrl");
                tracker_sparql_builder_object_unvalidated (sparql, uri);
        }
-
-       g_free (email_alias);
 }
 
 static void