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src/spectral/phasevoc.c: apply windowing to resynthesized grain

--- a/src/spectral/phasevoc.c

+++ b/src/spectral/phasevoc.c

@@ -65,6 +65,8 @@

   aubio_fft_rdo(pv->fft,fftgrain,pv->synth);

   /* unshift */

   fvec_ishift(pv->synth);

+  /* windowing */

+  fvec_weight(pv->synth, pv->w);

   /* additive synthesis */

   aubio_pvoc_addsynth(pv, synthnew);

 }