Result from ibase_query() to ibase_num_params() causes segfault.

[mlazdans]

$rs = ibase_query('SELECT * FROM test1 WHERE 1 = ?', 1);
var_dump(ibase_num_params($rs));

Segmentation fault (core dumped)

Segfault happens here:

php-firebird/ibase_query.c

Line 2272 in 4d808e9

if (ib_query->in_sqlda == NULL) {

This is caused by early free in PHP_FUNCTION(ibase_query)

php-firebird/ibase_query.c

Line 1345 in 4d808e9

_php_ibase_free_query(&ib_query);

This is also kinda related to #80 and one more reason to get rid of ibase_result struct in my opinion. Just keep everything related inside ibase_query struct and that data alive for as long as query it self is alive.