Fix unused parameter warnings

Signed-off-by: Chris Dickens <christopher.a.dickens@gmail.com>

examples/dpfp.c

@@ -411,6 +411,8 @@ static int alloc_transfers(void)
 
 static void sighandler(int signum)
 {
+	(void)signum;
+
 	do_exit = 1;
 }
 

examples/dpfp_threaded.c

@@ -84,6 +84,8 @@ static void *poll_thread_main(void *arg)
 	int r = 0;
 	printf("poll thread running\n");
 
+	(void)arg;
+
 	while (!do_exit) {
 		struct timeval tv = { 1, 0 };
 		r = libusb_handle_events_timeout(NULL, &tv);
@@ -441,6 +443,8 @@ static int alloc_transfers(void)
 
 static void sighandler(int signum)
 {
+	(void)signum;
+
 	request_exit(1);
 }
 

examples/hotplugtest.c

@@ -31,6 +31,11 @@ static int LIBUSB_CALL hotplug_callback(libusb_context *ctx, libusb_device *dev,
 	struct libusb_device_descriptor desc;
 	int rc;
 
+	(void)ctx;
+	(void)dev;
+	(void)event;
+	(void)user_data;
+
 	rc = libusb_get_device_descriptor(dev, &desc);
 	if (LIBUSB_SUCCESS != rc) {
 		fprintf (stderr, "Error getting device descriptor\n");
@@ -55,6 +60,11 @@ static int LIBUSB_CALL hotplug_callback(libusb_context *ctx, libusb_device *dev,
 
 static int LIBUSB_CALL hotplug_callback_detach(libusb_context *ctx, libusb_device *dev, libusb_hotplug_event event, void *user_data)
 {
+	(void)ctx;
+	(void)dev;
+	(void)event;
+	(void)user_data;
+
 	printf ("Device detached\n");
 
 	if (handle) {

libusb/os/darwin_usb.c

@@ -305,6 +305,7 @@ static usb_device_t **darwin_device_from_service (io_service_t service)
 }
 
 static void darwin_devices_attached (void *ptr, io_iterator_t add_devices) {
+  UNUSED(ptr);
   struct libusb_context *ctx;
   io_service_t service;
 
@@ -323,6 +324,7 @@ static void darwin_devices_attached (void *ptr, io_iterator_t add_devices) {
 }
 
 static void darwin_devices_detached (void *ptr, io_iterator_t rem_devices) {
+  UNUSED(ptr);
   struct libusb_device *dev = NULL;
   struct libusb_context *ctx;
   struct darwin_cached_device *old_device;

libusb/version_nano.h

@@ -1 +1 @@
-#define LIBUSB_NANO 11234
+#define LIBUSB_NANO 11235