Echo pad droppod fix (#4889)

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I manage to screw something up with every PR it seems - see #4868 

Updated droppod constructor arguments in droppod cosmetic PR (to make it
so you have the crate falling down sky) but only did so for Overwatch
pods, not Echo's.

This causes a deleted droppod to be launched anyway and remain on the
ground. AWKWARD.


# Changelog
:cl:
fix: Fixed ghost droppods appearing when launching crates by Echo pad.
/:cl:

code/game/supplyshuttle.dm

@@ -327,7 +327,7 @@ var/datum/controller/supply/supply_controller = new()
 		M.count_niche_stat(STATISTICS_NICHE_CRATES)
 
 	playsound(C.loc,'sound/effects/bamf.ogg', 50, 1)  //Ehh
-	var/obj/structure/droppod/supply/pod = new()
+	var/obj/structure/droppod/supply/pod = new(null, C)
 	C.forceMove(pod)
 	pod.launch(T)
 	visible_message("[icon2html(src, viewers(src))] [SPAN_BOLDNOTICE("'[C.name]' supply drop launched! Another launch will be available in five minutes.")]")