Merge pull request #14045 from dearmochi/auto-menders-fit-in-fridges

Refactor Smart Fridges, allow auto-menders to be put in Medical Fridges

code/__HELPERS/lists.dm

@@ -693,6 +693,9 @@ proc/dd_sortedObjectList(list/incoming)
 // Lazying Episode 3
 #define LAZYSET(L, K, V) LAZYINITLIST(L); L[K] = V;
 
+/// Returns whether a numerical index is within a given list's bounds. Faster than isnull(LAZYACCESS(L, I)).
+#define ISINDEXSAFE(L, I) (I >= 1 && I <= length(L))
+
 //same, but returns nothing and acts on list in place
 /proc/shuffle_inplace(list/L)
 	if(!L)