Fix afk hugger conversion (#4487)

# About the pull request

This PR is a followup to #3886 fixing dead huggers still converting to
normal huggers when client-less. The assumption was that life wouldn't
keep ticking when dead, but thats not the case.

# Explain why it's good for the game

Fixes #4486 

# Testing Photographs and Procedure
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<summary>Screenshots & Videos</summary>

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screenshots and the `<details>` tags.

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# Changelog
:cl: Drathek
fix: Fix dead huggers converting to non-player huggers
/:cl:

code/modules/mob/living/carbon/xenomorph/castes/Facehugger.dm

@@ -67,9 +67,13 @@
 		PF.flags_can_pass_all = PASS_ALL^PASS_OVER_THROW_ITEM
 
 /mob/living/carbon/xenomorph/facehugger/Life(delta_time)
-	if(stat != DEAD && !lying && !(mutation_type == FACEHUGGER_WATCHER) && !(locate(/obj/effect/alien/weeds) in get_turf(src)))
+	if(stat == DEAD)
+		return ..()
+
+	if(!lying && !(mutation_type == FACEHUGGER_WATCHER) && !(locate(/obj/effect/alien/weeds) in get_turf(src)))
 		adjustBruteLoss(1)
 		return ..()
+
 	if(!client && !aghosted && away_timer > XENO_FACEHUGGER_LEAVE_TIMER)
 		// Become a npc once again
 		new /obj/item/clothing/mask/facehugger(loc, hivenumber)