Fix species radiation multipliers (#1325)

Fixes radiation so species' radiation_mod values are actually applied.
Refactored radiation application to use proc apply_radiation() instead of directly modifying the variable.

code/game/dna/dna_modifier.dm

@@ -386,7 +386,7 @@
 		occupantData["uniqueEnzymes"] = connected.occupant.dna.unique_enzymes
 		occupantData["uniqueIdentity"] = connected.occupant.dna.uni_identity
 		occupantData["structuralEnzymes"] = connected.occupant.dna.struc_enzymes
-		occupantData["radiationLevel"] = connected.occupant.radiation
+		occupantData["radiationLevel"] = connected.occupant.total_radiation
 	data["occupant"] = occupantData;
 
 	data["isBeakerLoaded"] = connected.beaker ? 1 : 0

code/game/machinery/adv_med.dm

@@ -317,7 +317,7 @@
 		"fireloss" = H.getFireLoss(),
 		"oxyloss" = H.getOxyLoss(),
 		"toxloss" = H.getToxLoss(),
-		"rads" = H.radiation,
+		"rads" = H.total_radiation,
 		"cloneloss" = H.getCloneLoss(),
 		"brainloss" = H.getBrainLoss(),
 		"paralysis" = H.paralysis,

code/game/machinery/suit_storage_unit.dm

@@ -330,7 +330,7 @@
 	for(i=0,i<4,i++)
 		sleep(50)
 		if(src.OCCUPANT)
-			OCCUPANT.radiation += 50
+			OCCUPANT.apply_radiation(50)
 			if (!OCCUPANT.is_diona())
 				if(src.issuperUV)
 					var/burndamage = rand(28,35)
@@ -661,7 +661,7 @@
 	departments = list("Wizardry")
 	species = list("Human","Tajara","Skrell","Unathi")
 	can_repair = 1
-	
+
 /obj/machinery/suit_cycler/captain
 	name = "Captain suit cycler"
 	model_text = "Captain"

code/game/objects/items/devices/PDA/PDA.dm

@@ -1276,8 +1276,8 @@ var/global/list/obj/item/device/pda/PDAs = list()
 					O.show_message("<span class='warning'>\The [user] has analyzed [C]'s radiation levels!</span>", 1)
 
 				user.show_message("<span class='notice'>Analyzing Results for [C]:</span>")
-				if(C.radiation)
-					user.show_message("<span class='notice'>Radiation Level: [C.radiation]</span>")
+				if(C.total_radiation)
+					user.show_message("<span class='notice'>Radiation Level: [C.total_radiation]</span>")
 				else
 					user.show_message("<span class='notice'>No radiation detected.</span>")