Fix SensitiveParameter dumping

Author: Girgias

Zend/zend_attributes.c

@@ -138,7 +138,7 @@ ZEND_METHOD(SensitiveParameterValue, __debugInfo)
 
 static HashTable *attributes_sensitive_parameter_value_get_properties_for(zend_object *zobj, zend_prop_purpose purpose)
 {
-	return NULL;
+	return (HashTable*)&zend_empty_array;
 }
 
 ZEND_METHOD(Override, __construct)

Zend/zend_object_handlers.h

@@ -82,9 +82,15 @@ typedef void (*zend_object_unset_property_t)(zend_object *object, zend_string *m
 /* Used to remove a dimension of the object */
 typedef void (*zend_object_unset_dimension_t)(zend_object *object, zval *offset);
 
-/* Used to get hash of the properties of the object, as hash of zval's */
+/* Used to get hash of the properties of the object, as hash of zval's
+ * Must only return NULL when an exception occurs, if no properties
+ * return (HashTable*)&zend_empty_array;
+ */
 typedef HashTable *(*zend_object_get_properties_t)(zend_object *object);
 
+/* Must only return NULL when an exception occurs, if no properties
+ * return (HashTable*)&zend_empty_array;
+ */
 typedef HashTable *(*zend_object_get_debug_info_t)(zend_object *object, int *is_temp);
 
 typedef enum _zend_prop_purpose {