staging: comedi: change type of num_subdevices parameter to comedi_alloc_subdevices

The n_subdevices variable of struct comedi_device is an int type.
Change the type of the comedi_alloc_subdevices 'num_subdevices' from
an unsigned int to an int to match it.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbott@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/comedidev.h

@@ -292,7 +292,7 @@ static inline struct comedi_subdevice *comedi_get_write_subdevice(
 	return info->device->write_subdev;
 }
 
-int comedi_alloc_subdevices(struct comedi_device *, unsigned int);
+int comedi_alloc_subdevices(struct comedi_device *, int);
 
 void comedi_device_detach(struct comedi_device *dev);
 int comedi_device_attach(struct comedi_device *dev,

drivers/staging/comedi/drivers.c

@@ -56,10 +56,9 @@ static int poll_invalid(struct comedi_device *dev, struct comedi_subdevice *s);
 
 struct comedi_driver *comedi_drivers;
 
-int comedi_alloc_subdevices(struct comedi_device *dev,
-			    unsigned int num_subdevices)
+int comedi_alloc_subdevices(struct comedi_device *dev, int num_subdevices)
 {
-	unsigned i;
+	int i;
 
 	dev->n_subdevices = num_subdevices;
 	dev->subdevices =