4 random runtime fixes

code/modules/clothing/spacesuits/rig/rig.dm

@@ -337,7 +337,7 @@
 						if("helmet")
 							to_chat(M, "<span class='notice'>\The [piece] hisses [!seal_target ? "closed" : "open"].</span>")
 							M.update_inv_head()
-							if(helmet)
+							if(helmet?.light_system == STATIC_LIGHT)
 								helmet.update_light(wearer)
 
 					//sealed pieces become airtight, protecting against diseases

code/modules/food/food/snacks.dm

@@ -1020,7 +1020,9 @@
 
 /obj/item/weapon/reagent_containers/food/snacks/donkpocket/proc/cooltime()
 	if (src.warm)
-		spawn(4200)
+		spawn(420 SECONDS)
+			if(!src?.reagents)
+				return
 			src.warm = 0
 			for(var/reagent in heated_reagents)
 				src.reagents.del_reagent(reagent)

code/modules/vore/fluffstuff/custom_clothes_vr.dm

@@ -2320,7 +2320,7 @@ Departamental Swimsuits, for general use
 			item_state = "rgb"
 			overlay_state = "rgb"
 			to_chat(user, "The polychromic plates in your cloak activate, turning it white.")
-		has_suit.update_clothing_icon()
+		has_suit?.update_clothing_icon()
 
 /obj/item/clothing/accessory/poncho/roles/cloak/fluff/cloakglowing/verb/color_verb()
 	set name = "Swap color"