fix topic deconstruct for high level (#333)

* fix topic deconstruct for high level

Author: nick-zh

kafka_consumer.c

@@ -633,12 +633,6 @@ PHP_METHOD(RdKafka__KafkaConsumer, newTopic)
     }
 
     topic_intern->rkt = rkt;
-#if PHP_MAJOR_VERSION >= 7
-    topic_intern->zrk = *getThis();
-#else
-    topic_intern->zrk = getThis();
-#endif
-    Z_ADDREF_P(P_ZEVAL(topic_intern->zrk));
 }
 /* }}} */
 

tests/bug330.phpt

@@ -0,0 +1,15 @@
+--TEST--
+TopicPartition destruct for high level consumer
+--FILE--
+<?php
+use RdKafka\Conf;
+use RdKafka\KafkaConsumer;
+
+$conf = new Conf();
+$conf->set('group.id','test');
+$consumer = new KafkaConsumer($conf);
+$topic = $consumer->newTopic('test');
+unset($topic);
+var_dump(isset($topic));
+--EXPECT--
+bool(false)

topic.c

@@ -47,7 +47,7 @@ static void kafka_topic_free(zend_object *object TSRMLS_DC) /* {{{ */
 {
     kafka_topic_object *intern = get_custom_object(kafka_topic_object, object);
 
-    if (intern->rkt) {
+    if (ZE_ISDEF(intern->zrk)) {
         kafka_object *kafka_intern = get_kafka_object(P_ZEVAL(intern->zrk) TSRMLS_CC);
         if (kafka_intern) {
             zend_hash_index_del(&kafka_intern->topics, (zend_ulong)intern);