Candy Fixes

- Fixes the bad rainbow cotton candy not actually using a "toxin" as
it's reagent contents.
- - Previously contained Lexorin, now contains Sulfonal.

- Fixes the candy maker "eating" candy moulds and causing a runtime
while doing so.
- - Incorrect recipes still destroy the mould, but successful candy
making will return it's mould as intended.

code/modules/reagents/reagent_containers/food/snacks/candy.dm

@@ -718,7 +718,7 @@
 
 	New()
 		..()
-		reagents.add_reagent("lexorin", 20)
+		reagents.add_reagent("sulfonal", 20)
 		reagents.del_reagent("sugar")
 		reagents.update_total()
 		bitesize = 4