Proper mirror PR for the disease refactor because I fucked up the first one. (#2026)

* Revert "im a dumbass and didn't see the .rej files Revert "[MIRROR] Disease Refactor" (#2025)"

This reverts commit 44742cb115.

* Delete shuttle_loan.dm.rej

* Delete life.dm.rej

* Update life.dm

* Delete life.dm.rej

* compile

code/modules/mob/living/life.dm

@@ -18,12 +18,16 @@
 			return
 	var/datum/gas_mixture/environment = loc.return_air()
 
-	if(stat != DEAD)
-		//Breathing, if applicable
-		handle_breathing(times_fired)
 	if(stat != DEAD)
 		//Mutations and radiation
 		handle_mutations_and_radiation()
+
+	if(stat != DEAD)
+		//Breathing, if applicable
+		handle_breathing(times_fired)
+
+	handle_diseases() // DEAD check is in the proc itself; we want it to spread even if the mob is dead, but to handle its disease-y properties only if you're not.
+
 	if(stat != DEAD)
 		//Random events (vomiting etc)
 		handle_random_events()
@@ -60,6 +64,9 @@
 	radiation = 0 //so radiation don't accumulate in simple animals
 	return
 
+/mob/living/proc/handle_diseases()
+	return
+
 /mob/living/proc/handle_diginvis()
 	if(!digitaldisguise)
 		src.digitaldisguise = image(loc = src)