pragma once and minor change in transactions

src/storage.hpp

@@ -16,8 +16,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef LMDBAL_STORAGE_HPP
-#define LMDBAL_STORAGE_HPP
+#pragma once
 
 #include "storage.h"
 #include "exceptions.h"
@@ -1182,5 +1181,3 @@ template<>
 inline std::string LMDBAL::iStorage::toString(const std::string& value) {
     return value;
 }
-
-#endif //LMDBAL_STORAGE_HPP