libvlc_media_es_t: export ES id

include/vlc/libvlc_media.h

@@ -151,6 +151,7 @@ typedef struct libvlc_media_es_t
 {
     /* Codec fourcc */
     uint32_t    i_codec;
+    int         i_id;
     libvlc_es_type_t i_type;
 
     /* Codec specific */

src/control/media.c

@@ -673,6 +673,7 @@ libvlc_media_get_es( libvlc_media_t *p_md, libvlc_media_es_t ** pp_es )
 
 
         p_mes->i_codec = p_es->i_codec;
+        p_mes->i_id = p_es->i_id;
 
         p_mes->i_profile = p_es->i_profile;
         p_mes->i_level = p_es->i_level;