reverse show category

server.cpp

@@ -89,7 +89,8 @@ int main()
 		ResultSet *res = stmt->executeQuery("call show_category("+to_string(category_id)+");");
 
 		int i = 0;
-		while (res->next()) {
+		res->afterLast();
+		while (res->previous()) {
 			int id = res->getInt("id");
 			string description = res->getString("description");
 			int seconds = res->getInt("seconds");