backtrace of smbpasswd segfault

[Luke Kenneth Casson Leighton]

> 307	  new_entry_length = strlen(newpwd->unix_name) + 1 + 15 + 1 + 32 + 1 + 32 + 1 + NEW_PW_FORMAT_SPACE_PADDED_LEN + 1 + 13 + 2;
                                    ^^^^^^^^^^^^^^^^^ which one is NULL?