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src/pitch/pitchyinfft.c: fix out of bound read when samplerate > 50kHz (closes: #189)

--- a/src/pitch/pitchyinfft.c

+++ b/src/pitch/pitchyinfft.c

@@ -44,7 +44,7 @@

      0.,    20.,    25.,   31.5,    40.,    50.,    63.,    80.,   100.,   125.,

    160.,   200.,   250.,   315.,   400.,   500.,   630.,   800.,  1000.,  1250.,

   1600.,  2000.,  2500.,  3150.,  4000.,  5000.,  6300.,  8000.,  9000., 10000.,

- 12500., 15000., 20000., 25100

+ 12500., 15000., 20000., 25100., -1.

 };

 static const smpl_t weight[] = {

@@ -72,7 +72,8 @@

   p->weight = new_fvec (bufsize / 2 + 1);

   for (i = 0; i < p->weight->length; i++) {

     freq = (smpl_t) i / (smpl_t) bufsize *(smpl_t) samplerate;

-    while (freq > freqs[j]) {

+    while (freq > freqs[j] && freqs[j] > 0) {

+      AUBIO_DBG("freq %3.5f > %3.5f \tsamplerate %d (Hz) \t(weight length %d, bufsize %d) %d %d\n", freq, freqs[j], samplerate, p->weight->length, bufsize, i, j);

       j += 1;

     }

     a0 = weight[j - 1];