in getNewLand, do not freeze if no land is valid

landlock.cpp

@@ -631,11 +631,13 @@ EX eLand getNewLand(eLand old) {
 
   if(ls::horodisk_structure() && tortoise::seek()) LIKELY tab[cnt++] = laTortoise;
   
+  int attempts = 0;
   eLand n = old;
   while(incompatible(n, old) || !isLandIngame(n)) {
     n = tab[hrand(cnt)];
     if(weirdhyperbolic && specialland == laCrossroads4 && isCrossroads(n))
       n = laCrossroads4;
+    attempts++; if(attempts == 2000) break;
     }
   
   return n;