[MIRROR] more inits without returns (#9798)

Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>

code/game/objects/structures/props/beam_prism.dm

@@ -27,6 +27,7 @@
 	interaction_message = span_notice("The prismatic turret seems to be able to rotate.")
 
 /obj/structure/prop/prism/Initialize()
+	. = ..()
 	if(degrees_from_north)
 		animate(src, transform = turn(NORTH, degrees_from_north), time = 3)
 

code/game/objects/structures/props/machines.dm

@@ -252,6 +252,7 @@
 	icon_state = "stamper_on"
 
 /obj/structure/prop/machine/stamper/starts_on/Initialize()
+	. = ..()
 	add_overlay("stamper_proc")
 	add_overlay("stamper_but")
 
@@ -580,6 +581,7 @@
 	var/contents_original_pixel_y = 0
 
 /obj/structure/prop/machine/nt_pod/Initialize(mapload)
+	. = ..()
 	// Our non-map-preview state
 	icon_state = "nt_pod"