all: wrap up unsafe { nil } (p. 3)

vlib/eventbus/eventbus.v

@@ -20,7 +20,7 @@ mut:
 struct EventHandler {
 	name     string
 	handler  EventHandlerFn
-	receiver voidptr = voidptr(0)
+	receiver voidptr = unsafe { nil }
 	once     bool
 }