Gives the Doppler Array a sprite again. It still works somehow!

code/game/machinery/doppler_array.dm

@@ -4,6 +4,8 @@ var/list/doppler_arrays = list()
 	name = "tachyon-doppler array"
 	desc = "A highly precise directional sensor array which measures the release of quants from decaying tachyons. The doppler shifting of the mirror-image formed by these quants can reveal the size, location and temporal affects of energetic disturbances within a large radius ahead of the array."
 
+	icon_state = "doppler"
+
 /obj/machinery/doppler_array/New()
 	..()
 	doppler_arrays += src