fix a bug in the previous commit. don't leak empty list on error return and

fix the additional rare (out of memory only) bug that it was supposed to fix
of not freeing log_list when the python allocator failed.

Modules/_bsddb.c

@@ -4378,10 +4378,6 @@ DBEnv_log_archive(DBEnvObject* self, PyObject* args)
     if (!PyArg_ParseTuple(args, "|i:log_archive", &flags))
         return NULL;
 
-    list = PyList_New(0);
-    if (list == NULL)
-        return NULL;
-
     CHECK_ENV_NOT_CLOSED(self);
     MYDB_BEGIN_ALLOW_THREADS;
 #if (DBVER >= 40)
@@ -4394,6 +4390,13 @@ DBEnv_log_archive(DBEnvObject* self, PyObject* args)
     MYDB_END_ALLOW_THREADS;
     RETURN_IF_ERR();
 
+    list = PyList_New(0);
+    if (list == NULL) {
+        if (log_list)
+            free(log_list);
+        return NULL;
+    }
+
     if (log_list) {
         char **log_list_start;
         for (log_list_start = log_list; *log_list != NULL; ++log_list) {