Tgui and nif runtimes (#7864)

code/controllers/subsystems/tgui.dm

@@ -266,13 +266,13 @@ SUBSYSTEM_DEF(tgui)
  *
  * return int The number of UIs closed.
  */
-/datum/controller/subsystem/tgui/proc/close_user_uis(mob/user, datum/src_object)
+/datum/controller/subsystem/tgui/proc/close_user_uis(mob/user, datum/src_object, logout = FALSE)
 	var/count = 0
 	if(length(user?.tgui_open_uis) == 0)
 		return count
 	for(var/datum/tgui/ui in user.tgui_open_uis)
 		if(isnull(src_object) || ui.src_object == src_object)
-			ui.close()
+			ui.close(logout = logout)
 			count++
 	return count
 
@@ -318,7 +318,7 @@ SUBSYSTEM_DEF(tgui)
  * return int The number of UIs closed.
  */
 /datum/controller/subsystem/tgui/proc/on_logout(mob/user)
-	close_user_uis(user)
+	close_user_uis(user, logout = TRUE)
 
 /**
  * private

code/modules/nifsoft/nif.dm

@@ -461,7 +461,10 @@ You can also set the stat of a NIF to NIF_TEMPFAIL without any issues to disable
 
 //Uninstall a piece of software
 /obj/item/device/nif/proc/uninstall(var/datum/nifsoft/old_soft)
-	var/datum/nifsoft/NS = nifsofts[old_soft.list_pos]
+	var/datum/nifsoft/NS
+	if(nifsofts)
+		NS = nifsofts[old_soft.list_pos]
+
 	if(!NS || NS != old_soft)
 		return FALSE //what??
 

code/modules/tgui/tgui.dm

@@ -237,7 +237,7 @@
  * optional force bool Send an update even if UI is not interactive.
  */
 /datum/tgui/proc/send_update(custom_data, force)
-	if(!user.client || !initialized || closing)
+	if(!user?.client || !initialized || closing)
 		return
 	var/should_update_data = force || status >= STATUS_UPDATE
 	window.send_message("update", get_payload(
@@ -329,7 +329,8 @@
  */
 /datum/tgui/proc/process_status()
 	var/prev_status = status
-	status = src_object.tgui_status(user, state)
+	if(src_object)
+		status = src_object.tgui_status(user, state)
 	if(parent_ui)
 		status = min(status, parent_ui.status)
 	return prev_status != status