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tests/src/io/test-source_sndfile.c: avoid memory leak

--- a/tests/src/io/test-source_sndfile.c

+++ b/tests/src/io/test-source_sndfile.c

@@ -2,17 +2,18 @@

 #include <aubio.h>

 #include "config.h"

-char_t *path = "/home/piem/archives/drum_Chocolate_Milk_-_Ation_Speaks_Louder_Than_Words.wav";

+char_t *path = "/home/piem/archives/samples/loops/drum_Chocolate_Milk_-_Ation_Speaks_Louder_Than_Words.wav";

 int main(){

+  int err = 0;

 #ifdef HAVE_SNDFILE

-  uint_t samplerate = 32000;

+  uint_t samplerate = 192000;

   uint_t hop_size = 512;

   uint_t read = hop_size;

   fvec_t *vec = new_fvec(hop_size);

   aubio_source_sndfile_t * s = new_aubio_source_sndfile(path, samplerate, hop_size);

-  if (!s) return -1;

+  if (!s) { err = 1; goto beach; }

   while ( read == hop_size ) {

     aubio_source_sndfile_do(s, vec, &read);

@@ -20,10 +21,13 @@

     fprintf(stdout, "%d [%f, %f, ..., %f]\n", read, vec->data[0], vec->data[1], vec->data[read - 1]);

   }

+beach:

   del_aubio_source_sndfile(s);

+  del_fvec(vec);

 #else

   fprintf(stderr, "ERR: aubio was not compiled with aubio_source_sndfile\n");

+  err = 2;

 #endif /* HAVE_SNDFILE */

-  return 0;

+  return err;

 }