Do not show hidden lines in subrip subtitle.

(cherry picked from commit d966d7bf)

modules/demux/subtitle.c

@@ -888,6 +888,7 @@ static int ParseSubRipSubViewer( demux_t *p_demux, subtitle_t *p_subtitle,
                                     (int64_t)m2 * 60*1000 +
                                     (int64_t)s2 * 1000 +
                                     (int64_t)d2 ) * 1000;
+            if( p_subtitle->i_start < p_subtitle->i_stop )
                 break;
         }
     }