Description:
------------
If I use sybase_free_result() in a script, then php crashes.  The exact same code works fine in php 4.3.4.

./configure  --with-sybase-ct=${SYBASE}
   --enable-track-vars 
   --without-mysql 
   --with-apache=../apache_1.3.29
   --disable-dba 
   --enable-session 

Reproduce code:
---------------
<?php
$db = sybase_connect("server", "user", "pass");
$res = sybase_query("select name from sysdatabases", $db);
while ($data = sybase_fetch_array($res)) {
        print "db: $data[0]\n";
        }
sybase_free_result($res);
sybase_close($db);
?>

Expected result:
----------------
a list of databases with no crashes

Actual result:
--------------
> php s.php
db: master
db: model
db: sybsystemprocs
db: tempdb
Segmentation fault (core dumped)

> dbx php core
dbx version 3.11.10
Type 'help' for help.
Core file created by program "php"

signal Segmentation fault at   [_efree:241 ,0x12013e7c8]        CALCULATE_REAL_SIZE_AND_CACHE_INDEX(p->size);
(dbx) where
>  0 _efree(ptr = 0x52667250203a6264) ["/app/apps/web/php-4.3.5/Zend/zend_alloc.c":241, 0x12013e7c8]
   1 php_sybase_finish_results(result = 0x1400cd5b8) ["/app/apps/web/php-4.3.5/ext/sybase_ct/php_sybase_ct.c":1011, 0x1200e766c]
   2 zif_sybase_free_result(ht = 1, return_value = 0x1400d8298, this_ptr = (nil), return_value_used = 0) ["/app/apps/web/php-4.3.5/ext/sybase_ct/php_sybase_ct.c":1602, 0x1200e8f20]
   3 execute(op_array = 0x1400c52d8) ["/app/apps/web/php-4.3.5/Zend/zend_execute.c":1621, 0x12016fdf4]
   4 zend_execute_scripts(type = 8, retval = (nil), file_count = 3) ["/app/apps/web/php-4.3.5/Zend/zend.c":889, 0x120155be0]
   5 php_execute_script(primary_file = 0x11fffec10) ["/app/apps/web/php-4.3.5/main/main.c":1731, 0x120116d84]
   6 main(argc = 2, argv = 0x11fffef28) ["/app/apps/web/php-4.3.5/sapi/cli/php_cli.c":822, 0x1201722e4]
(dbx) up
php_sybase_finish_results:1011  efree(result->tmp_buffer[i]);
(dbx) up
zif_sybase_free_result:1602  php_sybase_finish_results(result);