[gnome-games] desktop: Fix tracker query

[Alexander Mikhaylenko <alexm src gnome org>]

commit 17037b4deee25e7e806430dde5e0e6505340fe13
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Sun Jun 14 23:27:20 2020 +0500

    desktop: Fix tracker query
    
    Fixes https://gitlab.gnome.org/GNOME/gnome-games/-/issues/296

 plugins/desktop/src/desktop-tracker-uri-query.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/plugins/desktop/src/desktop-tracker-uri-query.vala 
b/plugins/desktop/src/desktop-tracker-uri-query.vala
index fee975bb..535ccb25 100644
--- a/plugins/desktop/src/desktop-tracker-uri-query.vala
+++ b/plugins/desktop/src/desktop-tracker-uri-query.vala
@@ -2,6 +2,6 @@
 
 private class Games.DesktopTrackerUriQuery : Object, TrackerUriQuery {
        public string get_query () {
-               return "SELECT ?soft WHERE { ?soft nie:isLogicalPartOf 'urn:software-category:Game' . }";
+               return "SELECT nie:url(?urn) WHERE { ?urn nie:isLogicalPartOf 'urn:software-category:Game' . 
}";
        }
 }