Fix crash when new topic is not created.

Mostafa Razavi · edenhill · commit c20c535ab015 · 2019-11-26T12:40:15.000+01:00
The removed line (`i++;`) caused the most recent topic, which has just
failed to be created, to be passed to rdkafka to be destroyed, causing
a crash.
diff --git a/confluent_kafka/src/Admin.c b/confluent_kafka/src/Admin.c
@@ -394,7 +394,6 @@ static PyObject *Admin_create_topics (Handle *self, PyObject *args,
                         PyErr_Format(PyExc_ValueError,
                                      "Invalid NewTopic(%s): %s",
                                      newt->topic, errstr);
-                        i++;
                         goto err;
                 }
 

Original file line number	Diff line number	Diff line change
`@@ -394,7 +394,6 @@ static PyObject Admin_create_topics (Handle self, PyObject *args,`
`394`	`394`	`PyErr_Format(PyExc_ValueError,`
`395`	`395`	`"Invalid NewTopic(%s): %s",`
`396`	`396`	`newt->topic, errstr);`
`397`		`- i++;`
`398`	`397`	`goto err;`
`399`	`398`	`}`
`400`	`399`