modules/demux/ts.c: fix compiler warnings

Solve compiler warnings:
- unused parameters
- unsigned vs signed comparisons

modules/demux/ts.c

@@ -1616,8 +1616,8 @@ static void ParsePES( demux_t *p_demux, ts_pid_t *pid )
 {
     block_t *p_pes = pid->es->p_pes;
     uint8_t header[34];
-    int     i_pes_size = 0;
-    int     i_skip = 0;
+    size_t  i_pes_size = 0;
+    size_t  i_skip = 0;
     mtime_t i_dts = -1;
     mtime_t i_pts = -1;
     mtime_t i_length = 0;
@@ -3188,7 +3188,7 @@ static void PMTSetupEsTeletext( demux_t *p_demux, ts_pid_t *pid,
     es_format_t *p_fmt = &pid->es->fmt;
 
     ts_teletext_page_t p_page[2 * 64 + 20];
-    int i_page = 0;
+    size_t i_page = 0;
 
     /* Gather pages informations */
 #if defined _DVBPSI_DR_56_H_ && \
@@ -3207,7 +3207,7 @@ static void PMTSetupEsTeletext( demux_t *p_demux, ts_pid_t *pid,
         {
             const dvbpsi_teletextpage_t *p_src = &p_sub->p_pages[i];
 
-            if( p_src->i_teletext_type < 0 || p_src->i_teletext_type >= 0x06 )
+            if( /* p_src->i_teletext_type < 0 || */ p_src->i_teletext_type >= 0x06 )
                 continue;
 
             assert( i_page < sizeof(p_page)/sizeof(*p_page) );
@@ -3285,7 +3285,7 @@ static void PMTSetupEsTeletext( demux_t *p_demux, ts_pid_t *pid,
     }
     else
     {
-        for( int i = 0; i < i_page; i++ )
+        for( size_t i = 0; i < i_page; i++ )
         {
             ts_es_t *p_es;
 
@@ -3608,6 +3608,8 @@ static void PMTSetupEs0xA0( demux_t *p_demux, ts_pid_t *pid,
 static void PMTSetupEsHDMV( demux_t *p_demux, ts_pid_t *pid,
                            const dvbpsi_pmt_es_t *p_es )
 {
+    VLC_UNUSED( p_demux );
+
     es_format_t *p_fmt = &pid->es->fmt;
 
     /* Blu-Ray mapping */