Minor telecom code cleanup (#1691)

code/__HELPERS/_lists.dm

@@ -48,23 +48,23 @@
 //Checks if the list is empty
 /proc/isemptylist(list/L)
 	if(!L.len)
-		return 1
-	return 0
+		return TRUE
+	return FALSE
 
 //Checks for specific types in a list
 /proc/is_type_in_list(atom/A, list/L)
 	if(!L || !L.len || !A)
-		return 0
+		return FALSE
 	for(var/type in L)
 		if(istype(A, type))
-			return 1
-	return 0
+			return TRUE
+	return FALSE
 
 //Checks for specific types in specifically structured (Assoc "type" = TRUE) lists ('typecaches')
 /proc/is_type_in_typecache(atom/A, list/L)
 	if(!L || !L.len || !A)
 
-		return 0
+		return FALSE
 	if(ispath(A))
 		. = L[A]
 	else
@@ -76,7 +76,7 @@
 		return
 	for(var/V in L)
 		if(string == V)
-			return 1
+			return TRUE
 	return
 
 //Removes a string from a list