Fix warnings

ext/dom/document.c

@@ -790,7 +790,7 @@ PHP_FUNCTION(dom_document_create_element_ns)
 	zval *id, *rv = NULL;
 	xmlDocPtr docp;
 	xmlNodePtr nodep = NULL;
-	xmlNsPtr nsptr;
+	xmlNsPtr nsptr = NULL;
 	int ret, uri_len = 0, name_len = 0;
 	char *uri, *name;
 	char *localname = NULL, *prefix = NULL;

ext/dom/domimplementation.c

@@ -152,6 +152,8 @@ PHP_FUNCTION(dom_domimplementation_create_document)
 			php_error_docref(NULL TSRMLS_CC, E_WARNING, "DocumentType: Wrong Document");
 			RETURN_FALSE;
 		}
+	} else {
+		doctobj = NULL;
 	}
 
 	if (name_len > 0) {
@@ -216,7 +218,7 @@ PHP_FUNCTION(dom_domimplementation_create_document)
 
 	DOM_RET_OBJ(rv, (xmlNodePtr) docp, &ret, NULL);
 
-	if (doctype != NULL) {
+	if (doctobj != NULL) {
 		doctobj->document = ((dom_object *)((node_ptr *)docp->_private)->_private)->document;
 		increment_document_reference(doctobj, docp TSRMLS_CC);
 	}