tedious and fuckly error checking

error_check.c

char * py_call_module(char * name, struct irc_t * irc)
{
  struct py_module_t * mod;
  PyObject           * p_args;
  PyObject           * p_val;
  char               * ret;

  if (!(mod = g_hash_table_lookup(mod_hash_map, name)))
    return NULL;

  if (!(p_args = PyTuple_New(2)))
    return NULL;

  if (!(p_val = PyString_FromString(irc->from)))
    return NULL;

  if (PyTuple_SetItem(p_args, 0, p_val) != 0)
    return NULL;

  if (!(p_val = PyString_FromString(irc->request)))
    return NULL;

  if (PyTuple_SetItem(p_args, 1, p_val) != 0)
    return NULL;

  if (!(p_val = PyObject_CallObject(mod->pFunc, p_args)))
    return NULL;

  if(!(ret = PyString_AsString(p_val)))
    return NULL;

  return strdup(PyString_AsString(p_val));
}