subsdec: use VLC_TS_INVALID (refs #3135)

diff --git a/modules/codec/subtitles/subsdec.c b/modules/codec/subtitles/subsdec.c
index 121f171705c7b5b9126f41c4c4a8633e42f23763..2d45794a5bf5c35e6944260ef5a88c8d4b057842 100644 (file)
--- a/modules/codec/subtitles/subsdec.c
+++ b/modules/codec/subtitles/subsdec.c
@@ -407,7 +407,7 @@ static subpicture_t *ParseText( decoder_t *p_dec, block_t *p_block )
     video_format_t fmt;
 
     /* We cannot display a subpicture with no date */
-    if( p_block->i_pts == 0 )
+    if( p_block->i_pts <= VLC_TS_INVALID )
     {
         msg_Warn( p_dec, "subtitle without a date" );
         return NULL;