Adds defines for mouse_opacity

code/game/objects/effects/temporary_visuals/miscellaneous.dm

@@ -188,7 +188,7 @@
 		name = mimiced_atom.name
 		appearance = mimiced_atom.appearance
 		setDir(mimiced_atom.dir)
-		mouse_opacity = 0
+		mouse_opacity = MOUSE_OPACITY_TRANSPARENT
 
 /obj/effect/temp_visual/decoy/fading/Initialize(mapload, atom/mimiced_atom)
 	. = ..()
@@ -394,7 +394,7 @@
 		if(warp_color)
 			color = list(warp_color, warp_color, warp_color, list(0,0,0))
 			set_light(1.4, 1, warp_color)
-		mouse_opacity = 0
+		mouse_opacity = MOUSE_OPACITY_TRANSPARENT
 		var/matrix/skew = transform
 		skew = skew.Turn(180)
 		skew = skew.Interpolate(transform, 0.5)

code/game/objects/effects/temporary_visuals/temporary_visual.dm

@@ -3,7 +3,7 @@
 	icon_state = "nothing"
 	anchored = TRUE
 	layer = ABOVE_MOB_LAYER
-	mouse_opacity = 0
+	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
 	var/duration = 10 //in deciseconds
 	var/randomdir = TRUE
 	var/timerid