Fix the last of fox's noted bugs, runtime prevention

code/modules/reagents/Chemistry-Holder.dm

@@ -447,6 +447,7 @@ var/const/INGEST = 2
 			R.volume += amount
 			update_total()
 			my_atom.on_reagent_change()
+			R.on_merge(data)
 			handle_reactions()
 			return 0
 

code/modules/reagents/oldchem/reagents/reagents_water.dm

@@ -190,8 +190,8 @@
 						preserve += D
 				data["viruses"] = preserve
 
-	if(mix_data["blood_colour"])
-		color = mix_data["blood_colour"]
+		if(mix_data["blood_colour"])
+			color = mix_data["blood_colour"]
 	return 1
 
 /datum/reagent/blood/on_update(var/atom/A)