DVDnav: correctly update the title

Close #6013

modules/access/dvdnav.c

@@ -813,14 +813,19 @@ static int Demux( demux_t *p_demux )
         if( dvdnav_current_title_info( p_sys->dvdnav, &i_title,
                                        &i_part ) == DVDNAV_STATUS_OK )
         {
-            if( i_title >= 0 && i_title < p_sys->i_title &&
-                i_part >= 1 && i_part <= p_sys->title[i_title]->i_seekpoint &&
+            if( i_title >= 0 && i_title < p_sys->i_title )
+            {
+                p_demux->info.i_update |= INPUT_UPDATE_TITLE;
+                p_demux->info.i_title = i_title;
+
+                if( i_part >= 1 && i_part <= p_sys->title[i_title]->i_seekpoint &&
                         p_demux->info.i_seekpoint != i_part - 1 )
                 {
                     p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
                     p_demux->info.i_seekpoint = i_part - 1;
                 }
             }
+        }
         break;
     }