input: Return 0 from uinput poll if device isn't yet created.

Signed-off-by: Vojtech Pavlik <vojtech@suse.cz>

drivers/input/misc/uinput.c

@@ -280,7 +280,7 @@ static unsigned int uinput_poll(struct file *file, poll_table *wait)
 	struct uinput_device *udev = file->private_data;
 
 	if (!test_bit(UIST_CREATED, &(udev->state)))
-		return -ENODEV;
+		return 0;
 
 	poll_wait(file, &udev->waitq, wait);