Fixes Deep-Fried Grabs and Display Case Grabs (#7240)

* Fixes Grab's on Lethal Kitchen

Fixes the issue that I didn't have in testing. Fixes #7239

🆑 Twinmold
Fix: No longer able to cook grabs.
/🆑

* Fixes Display Case

Fixes #7212

* Changes Display Case to use ABSTRACT

So you can't put Ei'Nath into the case... Also, you already can't put
things like that in the deep fryer/other kitchen equipment, so that's
good.

code/modules/food_and_drinks/kitchen_machinery/deep_fryer.dm

@@ -61,7 +61,7 @@
 		head.disfigure("burn")
 		add_logs(user, G.affecting, "deep-fried", addition="'s face")
 		qdel(G) //Removes the grip so the person MIGHT have a small chance to run the fuck away and to prevent rapid dunks.
-		return 1
+		return 0
 	return 0
 
 

code/modules/food_and_drinks/kitchen_machinery/grill_new.dm

@@ -57,5 +57,5 @@
 		C.adjustFireLoss(30)
 		add_logs(user, G.affecting, "burned", src)
 		qdel(G) //Removes the grip to prevent rapid sears and give you a chance to run
-		return 1
+		return 0
 	return 0

code/modules/food_and_drinks/kitchen_machinery/oven_new.dm

@@ -63,5 +63,5 @@
 		C.Weaken(2)
 		add_logs(user, G.affecting, "smashed", addition="'s head on [src]")
 		qdel(G) //Removes the grip to prevent rapid bashes. With the weaken, you PROBABLY can't run unless they are slow to grab you again...
-		return 1
+		return 0
 	return 0