Fix #491 segfault in RdKafka\TopicPartition::__construct()

[remicollet]

Drop nullable attribute, default value should be enough.

If you want to keep it, you need an additional arg to store null, and test it (probably don't worth it)

    if (zend_parse_parameters(ZEND_NUM_ARGS(), "sl|l!", &topic, &topic_len, &partition, &offset, &is_null) == FAILURE) {
        ...
    }
    if (is_null) {
    ....
    }

[andypost]

@remicollet Thank you a lot! it passed all arches https://gitlab.alpinelinux.org/alpine/aports/-/pipelines/100300

[arnaud-lb]

Thanks @remicollet !

[andypost]

please create RC2 release

[arnaud-lb]

I will release it later today :)

[arnaud-lb]

https://pecl.php.net/package/rdkafka/6.0.0RC2

[andypost]

Thank you!