guards don't attack dead actors

MWSE/mods/celediel/MoreAttentiveGuards/combat.lua

@@ -22,6 +22,11 @@ local function doChecks(attacker, target)
     -- if player initiates combat or combat is not against player, do nothing
     if attacker == tes3.mobilePlayer or target ~= tes3.mobilePlayer then return false end
 
+    if attacker.isDead or target.isDead then
+        log("Someone's dead, not helping.")
+        return false
+    end
+
     -- inCombat is true after player has taken combat actions or after combat
     -- has gone on awhile, but hopefully the guards will already be attacking by
     -- then. Should be fine in cities, but will prevent players from provoking