Description:
------------
Segfault using db3 with php version 4.4.1 (and snapshot php4-STABLE-200511141355) as module for apache (no problems with cli).

Reproduce code:
---------------
<?
        $db = 'data/hereshow.db';
        $id = dba_open($db, 'n', 'db3');
        if(!$id) {
                exit('Could not open database '.$db);
        }

        $key = time();
        if(!dba_insert($key, 'Time in seconds', $id)) {
                dba_close($id);
                exit('Could not update database'.$db);
        }
        else {
                echo 'Successfully updated database with key = '.$key.'<br/>';
        }

        if(($value = dba_fetch($key,$id))) {
                echo 'Found key '.$key.' with value '.$value.'<br/>';
        }
        else {
                echo 'Could not find key '.$key.'<br/>';
        }

        dba_close($id);
?>


Expected result:
----------------
Correct hereshow.db db file in data directory.

Actual result:
--------------
The file hereshow.db is created and is empty (size 0). The process segfaults. The backtrace is the same for 4.4.1 and 200511141355:

(gdb) bt
#0  0x00317a7b in __dbenv_get_errfile () from /lib/libdb-4.2.so
#1  0x00308bf9 in __dbh_am_chk () from /lib/libdb-4.2.so
#2  0x006848b8 in dba_open_db3 () from /usr/local/lib/php/libphp4.so
#3  0x00681f7f in php_dba_find () from /usr/local/lib/php/libphp4.so
#4  0x00682aec in zif_dba_open () from /usr/local/lib/php/libphp4.so
#5  0x00806d87 in execute () from /usr/local/lib/php/libphp4.so
#6  0x007f388f in zend_execute_scripts () from /usr/local/lib/php/libphp4.so
#7  0x007be18f in php_execute_script () from /usr/local/lib/php/libphp4.so
#8  0x0080ccc6 in execute () from /usr/local/lib/php/libphp4.so
#9  0x08068026 in ap_run_handler (r=0x819e170) at config.c:152
#10 0x080685c8 in ap_invoke_handler (r=0x819e170) at config.c:364
#11 0x0806554f in ap_process_request (r=0x819e170) at http_request.c:249
#12 0x08060ec9 in ap_process_http_connection (c=0x8198078) at http_core.c:251
#13 0x08071186 in ap_run_process_connection (c=0x8198078) at connection.c:43
#14 0x080669d8 in child_main (child_num_arg=6833920) at prefork.c:610
#15 0x08066b8e in make_child (s=0x80a0ed0, slot=0) at prefork.c:650
#16 0x08066bff in startup_children (number_to_start=1) at prefork.c:722
#17 0x08067379 in ap_mpm_run (_pconf=0x809f0f0, plog=0x80cb1a0, s=0x1) at prefork.c:941
#18 0x0806cbc8 in main (argc=2, argv=0xbfffdbb4) at main.c:618

# ldd httpd 
[...]
libdb-4.2.so => /lib/libdb-4.2.so (0x00289000)
[...]

# ldd libphp4.so
[...]
libdb-3.3.so => /lib/libdb-3.3.so (0x00761000)
[...]

*NO* problems with the following httpd (different os version (older) - httpd linked against different libdb; same version of apache and php on both oses):
# ldd httpd
[...]
libdb-3.3.so => /lib/libdb-3.3.so (0x00275000)
[...]

PHP was configured with "--with-db3". This libdb versions are installed on affected system: db3-3.3.11, db4-4.2.52.