PVS-Studio warning V571 for iecsdk

int main(int argc, char *argv[]) {
  ...
  if(ret == PL_FAILURE) {
    if(ret == PL_FAILURE) {
      pl_csv_logger_error(
        PL_CSV_LOGGER_ERROR_UNABLE_TO_READ_PL
    );
  ...
}

This suspicious code was found in iecsdk project by PVS-Studio static code analyzer.
Warning message is:
V571 Recurring check. The 'if (ret == PL_FAILURE)' condition was already verified in line 1008. pl_csv_logger pl_csv_logger.c 1009

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/