From 1169b4febb5bd05c63c8b28230f01ea64e8be833 Mon Sep 17 00:00:00 2001
From: Martin Ambrus <martin@martinambrus.com>
Date: Sat, 25 Nov 2017 13:11:22 +0100
Subject: [PATCH] fix: not able to build new buildings

---
 GameEngine/Building.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/GameEngine/Building.php b/GameEngine/Building.php
index 41b7f3b4..94c0808c 100755
--- a/GameEngine/Building.php
+++ b/GameEngine/Building.php
@@ -83,7 +83,10 @@ class Building {
                     ($page == 'dorf2.php' && $id > 4)
                 ) &&
                 // check that we're not trying to change a standing building type
-                ($levels['f'.$tid.'t'] == $id)
+                (
+                    $levels['f'.$tid.'t'] == $id ||
+                    $levels['f'.$tid.'t'] == 0
+                )
             ) {
                 if ( $this->checkResource( $id, $tid ) != 4 ) {
                     if ( $tid >= 19 ) {