fix corruption when cloneDocument is not defined

diff --git a/ext/xsl/xsltprocessor.c b/ext/xsl/xsltprocessor.c
index d02682e98fa853de61ed12a81254c32964682971..37358d01bec6b3d9f2b96c47b37a6ca6cdd8d469 100644 (file)
--- a/ext/xsl/xsltprocessor.c
+++ b/ext/xsl/xsltprocessor.c
@@ -297,7 +297,7 @@ PHP_FUNCTION(xsl_xsltprocessor_import_stylesheet)
        xsltStylesheetPtr sheetp, oldsheetp;
        xsl_object *intern;
        php_libxml_node_object *docobj;
-       int prevSubstValue, prevExtDtdValue, clone_docu;
+       int prevSubstValue, prevExtDtdValue, clone_docu = 0;
        xmlNode *nodep;
        zend_object_handlers *std_hnd;
        zval *cloneDocu, *member;
@@ -333,9 +333,11 @@ PHP_FUNCTION(xsl_xsltprocessor_import_stylesheet)
        MAKE_STD_ZVAL(member);
        ZVAL_STRING(member, "cloneDocument", 0);
        cloneDocu = std_hnd->read_property(id, member, 1 TSRMLS_CC);
-       convert_to_long(cloneDocu);
+       if (Z_TYPE_P(cloneDocu) != IS_NULL) {
+               convert_to_long(cloneDocu);
+               clone_docu = Z_LVAL_P(cloneDocu);
+       }
        efree(member);
-       clone_docu = Z_LVAL_P(cloneDocu);
        if (clone_docu == 0) {
                /* check if the stylesheet is using xsl:key, if yes, we have to clone the document _always_ before a transformation */
                nodep = xmlDocGetRootElement(sheetp->doc)->children;