Fix check_file_readability function

#define PARSER 1

#include <unistd.h>

#include <stdio.h>

#include "nest/bird.h"

#include "conf/conf.h"

static void

check_file_readability(const char *file_path)

{

  if(access(file_path, R_OK) == -1)

    cf_error("File %s cannot be open for read: %m", file_path);

  FILE *file = fopen(file_path, "r");

  if (file)

    fclose(file);

  else

    cf_error("File '%s' cannot be open for read: %m", file_path);

}

CF_DECLS