Description:
------------
PHP 5.2.5 is crashing (segfault) when PHP programs call to curl 7.16.2. Upgrading to curl 7.17.1 fixes the problem, but this should not be a crash issue.

Reproduce code:
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WP-openid (Wordpress OpenID plugin -- calls to curl)

Expected result:
----------------
Should give a PHP error message, not a segfault

Actual result:
--------------
bt using gdb:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1209010496 (LWP 26155)]
0x012319be in add_assoc_string_ex (arg=0xb6e756e4, key=0x12f82db "libz_version", 
    key_len=13, str=0x0, duplicate=1)
    at /usr/local/directadmin/customapache/php-5.2.5/Zend/zend_API.c:1032
1032            ZVAL_STRING(tmp, str, duplicate);
(gdb) bt
#0  0x012319be in add_assoc_string_ex (arg=0xb6e756e4, key=0x12f82db "libz_version", 
    key_len=13, str=0x0, duplicate=1)
    at /usr/local/directadmin/customapache/php-5.2.5/Zend/zend_API.c:1032
#1  0x01038bb2 in zif_curl_version (ht=0, return_value=0xb6e756e4, return_value_ptr=0x0, 
    this_ptr=0x0, return_value_used=1)
    at /usr/local/directadmin/customapache/php-5.2.5/ext/curl/interface.c:1045
#2  0x0708af6b in get_module ()
   from /usr/local/Zend/lib/Optimizer-3.2.8/php-5.2.x/ZendOptimizer.so
#3  0x00000000 in ?? ()