implements isfood helper

code/modules/food_and_drinks/food/snacks.dm

@@ -303,7 +303,7 @@ All foods are distributed among various categories. Use common sense.
 	if(cooked_type)
 		result = new cooked_type(T)
 		//if the result is food, set its food quality to the original food item's quality
-		if(istype(result, /obj/item/reagent_containers/food))
+		if(isfood(result))
 			var/obj/item/reagent_containers/food/food_output = result
 			food_output.adjust_food_quality(food_quality + quality_increase)
 		if(istype(M))

code/modules/food_and_drinks/food/snacks_bread.dm

@@ -216,7 +216,7 @@ GLOBAL_LIST_INIT(frying_bad_chems, list(
 	item_flags = fried.item_flags
 	obj_flags = fried.obj_flags
 
-	if(istype(fried, /obj/item/reagent_containers/food))
+	if(isfood(fried))
 		fried.reagents.trans_to(src, fried.reagents.total_volume)
 		qdel(fried)
 	else

code/modules/food_and_drinks/kitchen_machinery/deep_fryer.dm

@@ -105,7 +105,7 @@ God bless America.
 			to_chat(user, "<span class='notice'>You put [I] into [src].</span>")
 			frying = new/obj/item/reagent_containers/food/snacks/deepfryholder(src, I)
 			//setup food quality for item depending on if it's edible or not
-			if(istype(I, /obj/item/reagent_containers/food))
+			if(isfood(I))
 				var/obj/item/reagent_containers/food/original_food = I
 				frying.adjust_food_quality(original_food.food_quality) //food quality remains unchanged until degree of frying is calculated
 			else

code/modules/reagents/chemistry/reagents/food_reagents.dm

@@ -776,7 +776,7 @@
 
 /datum/reagent/consumable/secretsauce/reaction_obj(obj/O, reac_volume)
 	//splashing any amount above or equal to 1u of secret sauce onto a piece of food turns its quality to 100
-	if(reac_volume >= 1 && istype(O, /obj/item/reagent_containers/food))
+	if(reac_volume >= 1 && isfood(O))
 		var/obj/item/reagent_containers/food/splashed_food = O
 		splashed_food.adjust_food_quality(100)
 		// if it's a customisable food, we need to edit its total quality too, to prevent its quality resetting from adding more ingredients!