Fix pycompare exit code if C++ produces empty file

                print("ERROR: C++ file is shorter than FORTRAN file.")

                fortran_file.close()

                c_file.close()

                mismatch_count['errors'] = line_count

                mismatch_count['errors'] = line_count if line_count > 0 else 1

                return mismatch_count

            f_lines[0] = fortran_file.readline()

            c_lines[0] = c_file.readline()