Merge pull request #6169 from Citadel-Station-13/upstream-merge-36722

[MIRROR] Fix 512-only code in recent conveyor belt fix

code/__HELPERS/_lists.dm

@@ -10,8 +10,8 @@
  */
 
 #define LAZYINITLIST(L) if (!L) L = list()
-#define UNSETEMPTY(L) if (L && !L.len) L = null
-#define LAZYREMOVE(L, I) if(L) { L -= I; if(!L.len) { L = null; } }
+#define UNSETEMPTY(L) if (L && !length(L)) L = null
+#define LAZYREMOVE(L, I) if(L) { L -= I; if(!length(L)) { L = null; } }
 #define LAZYADD(L, I) if(!L) { L = list(); } L += I;
 #define LAZYOR(L, I) if(!L) { L = list(); } L |= I;
 #define LAZYFIND(L, V) L ? L.Find(V) : 0