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)

code/modules/surgery/organs/blood.dm

@@ -213,8 +213,10 @@ var/const/BLOOD_VOLUME_SURVIVE = 122
 	B.data["donor"] = src
 	B.data["viruses"] = list()
 
-	for(var/datum/disease/D in src.viruses)
+	for(var/datum/disease/D in viruses)
 		B.data["viruses"] += D.Copy()
+	if(resistances && resistances.len)
+		B.data["resistances"] = resistances.Copy()
 
 	B.data["blood_DNA"] = copytext(src.dna.unique_enzymes,1,0)
 	B.data["blood_type"] = copytext(src.dna.b_type,1,0)