demux: mpeg: avoid false positives with WAVE/dts (fix #13866)

(cherry picked from commit cb4ea7cc766c1326ccd89412fab5e5621d4dd356)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/demux/mpeg/es.c

@@ -612,7 +612,12 @@ static int GenericProbe( demux_t *p_demux, int64_t *pi_offset,
             for( int t = 0; t < 1 + !!b_wav; t++ )
             {
                 if( t == 1 )
+                {
+                    if(!i_samples)
+                        break;
                     i_size = i_samples * 2 * 2;
+                }
+
                 if( i_skip + i_check_size + i_size <= i_peek )
                 {
                     b_ok = pf_check( &p_peek[i_skip+i_size], NULL ) >= 0;