Description:
------------
XSLT segfaults when trying to execute rather simple script and zend.ze1_compatibility_mode is On.
Turning zend.ze1_compatibility_mode = Off it works ok.

Reproduce code:
---------------
<?
$xslt = new xsltProcessor;

$document = new DomDocument();
$document->preserveWhiteSpace = false;
$f=$document->load('test.xslt');
$xslt->importStyleSheet($document);

?>

Expected result:
----------------
Found a top-level element xslutput with null namespace URI

Actual result:
--------------
Program received signal SIGSEGV, Segmentation fault.
0x081ec1d2 in zif_xsl_xsltprocessor_import_stylesheet (ht=1, return_value=0x83a69dc, this_ptr=0x83b8eec,
    return_value_used=0) at /home/tony/CVS/php-src/ext/xsl/xsltprocessor.c:369
369                     if (((xsltStylesheetPtr) intern->ptr)->_private != NULL) {
(gdb) bt
#0  0x081ec1d2 in zif_xsl_xsltprocessor_import_stylesheet (ht=1, return_value=0x83a69dc, this_ptr=0x83b8eec,
    return_value_used=0) at /home/tony/CVS/php-src/ext/xsl/xsltprocessor.c:369
#1  0x0826a938 in zend_do_fcall_common_helper (execute_data=0xbfffd3b0, opline=0x83b8dd4, op_array=0x83b4374)
    at /home/tony/CVS/php-src/Zend/zend_execute.c:2699
#2  0x0826b014 in zend_do_fcall_by_name_handler (execute_data=0xbfffd3b0, opline=0x83b8dd4, op_array=0x83b4374)
    at /home/tony/CVS/php-src/Zend/zend_execute.c:2810
#3  0x08266a02 in execute (op_array=0x83b4374) at /home/tony/CVS/php-src/Zend/zend_execute.c:1391
#4  0x0823f417 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /home/tony/CVS/php-src/Zend/zend.c:1061
#5  0x081f1d81 in php_execute_script (primary_file=0xbffff7f0) at /home/tony/CVS/php-src/main/main.c:1627
#6  0x082750ca in main (argc=3, argv=0xbffff884) at /home/tony/CVS/php-src/sapi/cli/php_cli.c:943
#7  0x40cc6af7 in __libc_start_main () from /lib/i686/libc.so.6