From 3131f766339fa58875bce8257f6127136c217a30 Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Thu, 10 Mar 2016 15:58:38 +0300
Subject: Add missing check.

---
 src/being/being.cpp | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/being/being.cpp b/src/being/being.cpp
index 0be04ac0b..cb276801a 100644
--- a/src/being/being.cpp
+++ b/src/being/being.cpp
@@ -1719,12 +1719,14 @@ void Being::nextTile() restrict2
 
     if (mX != pos.x || mY != pos.y)
     {
-        mOldHeight = mMap->getHeightOffset(mX, mY);
-        if (mMap &&
-            mReachable == Reachable::REACH_NO &&
-            mMap->getBlockMask(mX, mY) != mMap->getBlockMask(pos.x, pos.y))
+        if (mMap)
         {
-            mReachable = Reachable::REACH_UNKNOWN;
+            mOldHeight = mMap->getHeightOffset(mX, mY);
+            if (mReachable == Reachable::REACH_NO &&
+                mMap->getBlockMask(mX, mY) != mMap->getBlockMask(pos.x, pos.y))
+            {
+                mReachable = Reachable::REACH_UNKNOWN;
+            }
         }
     }
     mX = pos.x;
-- 
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