S3_get_object leaks if the object doesn't exist

[bsdinis]

when calling S3_get_object when the key in question doesn't exist in bucket, valgrind reports a bunch of conditional jumps on unitialized values and a leak.

example program

#include <stdio.h>
#include "libs3.h"

static S3Status getObjectDataCallback(int bufferSize, const char *buffer
{
  FILE *outfile = (FILE *) callbackData;
  if (bufferSize <= 0) return S3StatusOK;
  size_t wrote = fwrite(buffer, 1, bufferSize, outfile);
  return ((wrote < (size_t) bufferSize) ? S3StatusAbortedByCallback : S3
}

int s3_get(const char * key, FILE * stream)
{
  S3GetObjectHandler getObjectHandler = {
    responseHandler,
    &getObjectDataCallback
  };

  S3_get_object(
      &bucketContext,
      key,
      NULL,
      0,
      0,
      NULL,
      0,
      &getObjectHandler,
      stream
      );
  return 0;
}

int main(int argc, char ** argv)
{
  if (argc != 2) {
    fprintf(stderr, "usage: %s key\n", argv[0]);
    return -1;
  }

  S3_initialize(NULL, S3_INIT_ALL, host);

  s3_get(argv[1], stdout);                                              

  S3_deinitialize();

  return 0;
}