[MIRROR] Converts several species traits into generic traits (#5710)

* Converts several species traits into generic traits

* Update traits.dm

* Update mousetrap.dm

* Update corporate.dm

* Update jellypeople.dm

* snowflake fix

code/datums/weather/weather_types/radiation_storm.dm

@@ -33,16 +33,15 @@
 	if(prob(40))
 		if(ishuman(L))
 			var/mob/living/carbon/human/H = L
-			if(H.dna && H.dna.species)
-				if(!(RADIMMUNE in H.dna.species.species_traits))
-					if(prob(max(0,100-resist)))
-						H.randmuti()
-						if(prob(50))
-							if(prob(90))
-								H.randmutb()
-							else
-								H.randmutg()
-							H.domutcheck()
+			if(H.dna && !H.has_trait(TRAIT_RADIMMUNE))
+				if(prob(max(0,100-resist)))
+					H.randmuti()
+					if(prob(50))
+						if(prob(90))
+							H.randmutb()
+						else
+							H.randmutg()
+						H.domutcheck()
 		L.rad_act(20)
 
 /datum/weather/rad_storm/end()