Fix some runtimes & posibrain oddities

code/ATMOSPHERICS/atmospherics.dm

@@ -130,6 +130,8 @@ Pipelines + Other Objects -> Pipe network
 	qdel(src)
 
 /obj/machinery/atmospherics/proc/nullifyPipenet(datum/pipeline/P)
+	if(!P)
+		return
 	P.other_atmosmch -= src
 
 /obj/machinery/atmospherics/proc/getpipeimage(var/iconset, var/iconstate, var/direction, var/col=rgb(255,255,255))

code/ATMOSPHERICS/components/unary_devices/unary_base.dm

@@ -103,6 +103,8 @@ Housekeeping and pipe network stuff below
 
 /obj/machinery/atmospherics/unary/nullifyPipenet()
 	..()
+	if(!parent)
+		return
 	parent.other_airs -= air_contents
 	parent = null
 

code/ATMOSPHERICS/datum_pipeline.dm

@@ -219,6 +219,8 @@ var/pipenetwarnings = 10
 
 	for(var/i=1;i<=PL.len;i++)
 		var/datum/pipeline/P = PL[i]
+		if(!P)
+			return
 		GL += P.air
 		GL += P.other_airs
 		for(var/obj/machinery/atmospherics/binary/valve/V in P.other_atmosmch)

code/_onclick/hud/alert.dm

@@ -63,7 +63,7 @@
 	var/obj/screen/alert/path_as_obj = text2path("/obj/screen/alert/[id]")
 	// BYOND magic-fu - we'll be storing a path in this reference and retrieving vars from it.
 	if(!path_as_obj)
-		ERROR("[src] threw alert [category] with invalid path /obj/screen/alert/[id]")
+//		ERROR("[src] threw alert [category] with invalid path /obj/screen/alert/[id]")
 		return 0
 	alert.name = initial(path_as_obj.name)
 	alert.desc = initial(path_as_obj.desc)

code/modules/admin/admin_verbs.dm

@@ -555,8 +555,8 @@ var/list/admin_verbs_hideable = list(
 		var/list/Lines = file2list("config/admins.txt")
 		for(var/line in Lines)
 			var/list/splitline = text2list(line, " = ")
-			if(splitline.len >= 2)
-				if(cmptext(splitline[1], src.ckey))
+			if(lowertext(splitline[1]) == ckey)
+				if(splitline.len >= 2)
 					rank = ckeyEx(splitline[2])
 				break
 			continue

code/modules/mob/living/carbon/brain/death.dm

@@ -5,6 +5,8 @@
 			O.show_message(text("<span class='userdanger'>[]'s MMI flatlines!</span>", src), 1, "<span class='danger'>You hear something flatline.</span>", 2)
 		if(istype(src,/obj/item/organ/brain/alien))
 			container.icon_state = "mmi_alien_dead"
+		if(istype(container, /obj/item/device/mmi/posibrain))
+			container.icon_state = "posibrain"
 		else
 			container.icon_state = "mmi_dead"
 	stat = DEAD

code/modules/mob/living/carbon/brain/posibrain.dm

@@ -51,9 +51,15 @@ var/global/posibrain_notif_cooldown = 0
 	if((brainmob && brainmob.key) || jobban_isbanned(user,"posibrain") || istype(src.loc, /mob/living/silicon))
 		return
 
+
 	var/posi_ask = alert("Become a positronic brain? (Warning, You can no longer be cloned, and all past lives will be forgotten!)","Are you positive?","Yes","No")
 	if(posi_ask == "No" || gc_destroyed)
 		return
+	if((brainmob && brainmob.key) || istype(src.loc, /mob/living/silicon)) //Prevents hostile takeover if two ghosts get the prompt for the same brain.
+		user << "This brain has already been taken! Please try your possesion again later!"
+		return
+	create_brainmob()
+
 	transfer_personality(user)
 
 /obj/item/device/mmi/posibrain/transfer_identity(var/mob/living/carbon/H)
@@ -84,7 +90,6 @@ var/global/posibrain_notif_cooldown = 0
 	notified = 0
 	brainmob.mind = candidate.mind
 	brainmob.ckey = candidate.ckey
-	brainmob.name = "[pick(list("PBU","HIU","SINA","ARMA","OSI","HBL","MSO","RR"))]-[rand(100, 999)]" //Re-initialize the name so it doesn't repeat
 	name = "positronic brain ([brainmob.name])"
 
 //	brainmob.mind.remove_all_antag()
@@ -127,14 +132,6 @@ var/global/posibrain_notif_cooldown = 0
 
 /obj/item/device/mmi/posibrain/New()
 
-	brainmob = new(src)
-	brainmob.name = "[pick(list("PBU","HIU","SINA","ARMA","OSI","HBL","MSO","RR"))]-[rand(100, 999)]" //I bet these initial are references to tg admins, we could use some new ones
-	brainmob.real_name = brainmob.name
-	brainmob.loc = src
-	brainmob.container = src
-	brainmob.stat = 0
-	brainmob.silent = 0
-	dead_mob_list -= brainmob
 	ping_ghosts("created")
 
 	..()
@@ -154,3 +151,17 @@ var/global/posibrain_notif_cooldown = 0
 		icon_state = "posibrain-occupied"
 	else
 		icon_state = "posibrain"
+
+
+/obj/item/device/mmi/posibrain/proc/create_brainmob()
+	if(brainmob)
+		qdel(brainmob)
+		brainmob = null //empty it out first
+	brainmob = new(src)
+	brainmob.name = "[pick(list("PBU","HIU","SINA","ARMA","OSI","HBL","MSO","RR"))]-[rand(100, 999)]"
+	brainmob.real_name = brainmob.name
+	brainmob.loc = src
+	brainmob.container = src
+	brainmob.stat = 0
+	brainmob.silent = 0
+	dead_mob_list -= brainmob

code/modules/reagents/Chemistry-Holder.dm

@@ -113,6 +113,8 @@ datum/reagents/proc/trans_to(var/obj/target, var/amount=1, var/multiplier=1, var
 			return
 		R = target.reagents
 	amount = min(min(amount, src.total_volume), R.maximum_volume-R.total_volume)
+	if(!total_volume) //well why are we here anyways?
+		return
 	var/part = amount / src.total_volume
 	var/trans_data = null
 	for (var/datum/reagent/current_reagent in src.reagent_list)