staging: comedi: comedi_fops: make bool bit-field unsigned int bit-fields.

Checkpatch complains on bool bitfields to be an int or u8/u16/u32
bitfield.

Make bool bit-fields to be unsigned int bit-fields.
Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/comedi_fops.c

@@ -60,7 +60,7 @@ struct comedi_file {
 	struct comedi_subdevice *read_subdev;
 	struct comedi_subdevice *write_subdev;
 	unsigned int last_detach_count;
-	bool last_attached:1;
+	unsigned int last_attached:1;
 };
 
 #define COMEDI_NUM_MINORS 0x100