Fix a few small runtimes (#49352)

Nothing special here, mostly sanity.
Defib hud is awful, needs rewrite.

code/datums/traits/neutral.dm

@@ -128,7 +128,7 @@
 
 /datum/quirk/phobia/post_add()
 	var/mob/living/carbon/human/H = quirk_holder
-	H.gain_trauma(new /datum/brain_trauma/mild/phobia(H.client.prefs.phobia), TRAUMA_RESILIENCE_ABSOLUTE)
+	H.gain_trauma(new /datum/brain_trauma/mild/phobia(H.client?.prefs.phobia), TRAUMA_RESILIENCE_ABSOLUTE)
 
 /datum/quirk/phobia/remove()
 	var/mob/living/carbon/human/H = quirk_holder

code/game/objects/effects/effect_system/effects_foam.dm

@@ -39,9 +39,10 @@
 	if(hotspot && istype(T) && T.air)
 		qdel(hotspot)
 		var/datum/gas_mixture/G = T.air
-		var/plas_amt = min(30,G.gases[/datum/gas/plasma][MOLES]) //Absorb some plasma
-		G.gases[/datum/gas/plasma][MOLES] -= plas_amt
-		absorbed_plasma += plas_amt
+		if(G.gases[/datum/gas/plasma])
+			var/plas_amt = min(30,G.gases[/datum/gas/plasma][MOLES]) //Absorb some plasma
+			G.gases[/datum/gas/plasma][MOLES] -= plas_amt
+			absorbed_plasma += plas_amt
 		if(G.temperature > T20C)
 			G.temperature = max(G.temperature/2,T20C)
 		G.garbage_collect()

code/game/objects/items/twohanded.dm

@@ -487,15 +487,17 @@
 	name = "explosive lance"
 	var/obj/item/grenade/explosive = null
 
-/obj/item/twohanded/spear/explosive/Initialize(mapload, obj/item/grenade/G)
+/obj/item/twohanded/spear/explosive/Initialize(mapload)
 	. = ..()
-	if (!G)
-		G = new /obj/item/grenade/iedcasing() //For admin-spawned explosive lances
+	set_explosive(new /obj/item/grenade/iedcasing()) //For admin-spawned explosive lances
+	
+	
+/obj/item/twohanded/spear/explosive/proc/set_explosive(obj/item/grenade/G)
+	if(explosive)
+		QDEL_NULL(explosive)
 	G.forceMove(src)
 	explosive = G
 	desc = "A makeshift spear with [G] attached to it"
-	update_icon()
-
 
 /obj/item/twohanded/spear/explosive/CheckParts(list/parts_list)
 	var/obj/item/grenade/G = locate() in parts_list
@@ -507,7 +509,7 @@
 		icon_prefix = lancePart.icon_prefix
 		parts_list -= G
 		parts_list -= lancePart
-		Initialize(src.loc, G)
+		set_explosive(G)
 		qdel(lancePart)
 	..()
 

code/modules/antagonists/blob/blobstrains/networked_fibers.dm

@@ -34,5 +34,5 @@
 /datum/reagent/blob/networked_fibers/reaction_mob(mob/living/M, method=TOUCH, reac_volume, show_message, touch_protection, mob/camera/blob/O)
 	reac_volume = ..()
 	M.apply_damage(0.6*reac_volume, BRUTE)
-	if(M)
+	if(!QDELETED(M))
 		M.apply_damage(0.6*reac_volume, BURN)

code/modules/events/wizard/rpgloot.dm

@@ -10,7 +10,7 @@
 	for(var/obj/item/I in world)
 		CHECK_TICK
 
-		if(!(I.flags_1 & INITIALIZED_1))
+		if(!(I.flags_1 & INITIALIZED_1) || QDELETED(I))
 			continue
 
 		I.AddComponent(/datum/component/fantasy)

code/modules/mob/dead/observer/observer.dm

@@ -154,9 +154,8 @@ GLOBAL_VAR_INIT(observer_default_invisibility, INVISIBILITY_OBSERVER)
 
 /mob/dead/observer/Destroy()
 	// Update our old body's medhud since we're abandoning it
-	if(mind)
-		var/mob/living/carbon/current = mind.current
-		current.med_hud_set_status()
+	if(mind && mind.current)
+		mind.current.med_hud_set_status()
 
 	GLOB.ghost_images_default -= ghostimage_default
 	QDEL_NULL(ghostimage_default)

code/modules/spells/spell_types/godhand.dm

@@ -33,7 +33,8 @@
 	. = ..()
 	if(!proximity)
 		return
-	user.say(catchphrase, forced = "spell")
+	if(catchphrase)
+		user.say(catchphrase, forced = "spell")
 	playsound(get_turf(user), on_use_sound,50,TRUE)
 	charges--
 	if(charges <= 0)