mp3dec: ask for 8khz switch point mp3s

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/mpegaudiodec.c

@@ -205,6 +205,8 @@ static void ff_compute_band_indexes(MPADecodeContext *s, GranuleDef *g)
 {
     if (g->block_type == 2) {
         if (g->switch_point) {
+            if(s->sample_rate_index == 8)
+                av_log_ask_for_sample(s->avctx, "switch point in 8khz\n");
             /* if switched mode, we handle the 36 first samples as
                 long blocks.  For 8000Hz, we handle the 72 first
                 exponents as long blocks */