Fix construction of HE pipes, Vents, and Scrubbers Plus qdel issues.

The initialize() routines of HE pipes, vents an scrubbers need to be atmos_init() after all.
If you register yourself with radio controller you need to de-register yourself too.

code/ATMOSPHERICS/components/unary/outlet_injector.dm

@@ -28,6 +28,10 @@
 	..()
 	air_contents.volume = ATMOS_DEFAULT_VOLUME_PUMP + 500	//Give it a small reservoir for injecting. Also allows it to have a higher flow rate limit than vent pumps, to differentiate injectors a bit more. 
 
+/obj/machinery/atmospherics/unary/outlet_injector/Destroy()
+	unregister_radio(src, frequency)
+	. = ..()
+
 /obj/machinery/atmospherics/unary/outlet_injector/update_icon()
 	if(!powered())
 		icon_state = "off"

code/ATMOSPHERICS/components/unary/vent_pump.dm

@@ -256,7 +256,7 @@
 	return 1
 
 
-/obj/machinery/atmospherics/unary/vent_pump/initialize()
+/obj/machinery/atmospherics/unary/vent_pump/atmos_init()
 	..()
 
 	//some vents work his own special way

code/ATMOSPHERICS/components/unary/vent_scrubber.dm

@@ -119,7 +119,7 @@
 
 	return 1
 
-/obj/machinery/atmospherics/unary/vent_scrubber/initialize()
+/obj/machinery/atmospherics/unary/vent_scrubber/atmos_init()
 	..()
 	radio_filter_in = frequency==initial(frequency)?(RADIO_FROM_AIRALARM):null
 	radio_filter_out = frequency==initial(frequency)?(RADIO_TO_AIRALARM):null