Runtime fixes

code/modules/mob/living/silicon/silicon.dm

@@ -8,8 +8,7 @@
 	var/list/alarms_to_clear = list()
 	var/list/hud_list[10]
 	var/list/speech_synthesizer_langs = list()	//which languages can be vocalized by the speech synthesizer
-	var/list/alarm_types_show = list("Motion" = 0, "Fire" = 0, "Atmosphere" = 0, "Power" = 0, "Camera" = 0)
-	var/list/alarm_types_clear = list("Motion" = 0, "Fire" = 0, "Atmosphere" = 0, "Power" = 0, "Camera" = 0)
+	var/list/alarm_handlers = list() // List of alarm handlers this silicon is registered to
 	var/designation = ""
 	var/obj/item/device/camera/siliconcam/aiCamera = null //photography
 //Used in say.dm, allows for pAIs to have different say flavor text, as well as silicons, although the latter is not implemented.
@@ -33,7 +32,7 @@
 	init_subsystems()
 	
 /mob/living/silicon/Destroy()
-	for(var/datum/alarm_handler/AH in alarm_manager.all_handlers)
+	for(var/datum/alarm_handler/AH in alarm_handlers)
 		AH.unregister(src)
 	return ..()
 

code/modules/mob/living/silicon/subsystems.dm

@@ -40,6 +40,7 @@
 	for(var/datum/alarm_handler/AH in register_to)
 		AH.register(src, /mob/living/silicon/proc/receive_alarm)
 		queued_alarms[AH] = list()	// Makes sure alarms remain listed in consistent order
+		alarm_handlers |= AH
 
 /********************
 *	Alarm Monitor	*

code/modules/recycling/disposal.dm

@@ -235,6 +235,9 @@
 	return
 	
 /obj/machinery/disposal/ui_interact(mob/user, ui_key = "main", var/datum/nanoui/ui = null, var/force_open = 1)
+	if(!air_contents) // I'm totally blaming Pete for you Donkie, because this is really shitty
+		return
+		
 	var/data[0]
 	
 	var/pressure = 100 * air_contents.return_pressure() / (SEND_PRESSURE)
@@ -741,6 +744,9 @@
 
 	proc/expel(var/obj/structure/disposalholder/H, var/turf/T, var/direction)
 
+		if(!T)
+			return
+			
 		var/turf/target
 
 		if(T.density)		// dense ouput turf, so stop holder