Removes an unneded istype in A* pathfinding (#66450)

* Removes an unneded istype in pathfinding procs

code/game/objects/structures/girders.dm

@@ -350,7 +350,7 @@
 
 /obj/structure/girder/CanAStarPass(obj/item/card/id/ID, to_dir, atom/movable/caller)
 	. = !density
-	if(istype(caller))
+	if(caller)
 		. = . || (caller.pass_flags & PASSGRILLE)
 
 /obj/structure/girder/deconstruct(disassembled = TRUE)

code/game/objects/structures/grille.dm

@@ -168,7 +168,7 @@
 
 /obj/structure/grille/CanAStarPass(obj/item/card/id/ID, to_dir, atom/movable/caller)
 	. = !density
-	if(istype(caller))
+	if(caller)
 		. = . || (caller.pass_flags & PASSGRILLE)
 
 /obj/structure/grille/wirecutter_act(mob/living/user, obj/item/tool)

code/game/objects/structures/tables_racks.dm

@@ -130,7 +130,7 @@
 
 /obj/structure/table/CanAStarPass(obj/item/card/id/ID, to_dir, atom/movable/caller)
 	. = !density
-	if(istype(caller))
+	if(caller)
 		. = . || (caller.pass_flags & PASSTABLE)
 
 /obj/structure/table/proc/tableplace(mob/living/user, mob/living/pushed_mob)