some thoughts about cursors, nothing special yet

src/storage.hpp

@@ -54,7 +54,10 @@ LMDBAL::Storage<K, V>::Storage(const std::string& _name, Base* parent):
  * \brief Destroys a storage
  */
 template<class K, class V>
-LMDBAL::Storage<K, V>::~Storage() {}
+LMDBAL::Storage<K, V>::~Storage() {
+    for (Cursor<K, V>* cursor : cursors)
+        delete cursor;
+}
 
 /**
  * \brief Adds a key-value record to the storage