staging: comedi: ni_mio_common: remove deadcode in ni_cdio_cmdtest()

Reported by: coverity
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/ni_mio_common.c

@@ -3549,12 +3549,10 @@ static int ni_cdio_cmdtest(struct comedi_device *dev,
 	if (err)
 		return 3;
 
-	/* step 4: fix up any arguments */
-
-	if (err)
-		return 4;
+	/* Step 4: fix up any arguments */
 
 	/* Step 5: check channel list if it exists */
+
 	if (cmd->chanlist && cmd->chanlist_len > 0)
 		err |= ni_cdio_check_chanlist(dev, s, cmd);