Slimes will now dump reagents they can't process.

They won't throw up a runtime and then refuse to process more stuff.

code/modules/xenobio2/mob/xeno procs.dm

@@ -64,6 +64,10 @@ Procs for targeting
 
 			reagent_response = chemreact[R.id]
 
+			if(!reagent_response)
+				temp_chem_holder.reagents.clear_reagents()
+				return 1
+
 			if(reagent_response["toxic"])
 				adjustToxLoss(reagent_response["toxic"] * reagent_total)