From 63013f643e6eff9293380f837e4de68132f08b83 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Wed, 16 May 2018 00:05:14 +0200
Subject: [PATCH] Windy Plains is now 'pattern incompatible' in non37

---
 landlock.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/landlock.cpp b/landlock.cpp
index 17e05970..63e28476 100644
--- a/landlock.cpp
+++ b/landlock.cpp
@@ -1116,6 +1116,9 @@ land_validity_t& land_validity(eLand l) {
   // mirrors do not work in gp
   if(among(l, laMirror, laMirrorOld) && gp::on)
     return dont_work;
+  
+  if(l == laWhirlwind && hyperbolic_non37)
+    return pattern_incompatibility;
 
   // available only in non-standard geometries
   if(l == laMirrorOld && !geometry)