Windows (usbdk): Remove unnecessary bookkeeping

The core library will not call the backend's exit() function if the
init() function does not succeed, so keeping track of whether init()
successfully completed is redundant.

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

libusb/os/windows_usbdk.c

@@ -67,7 +67,6 @@ typedef int32_t USBD_STATUS;
 #endif
 
 static int concurrent_usage = -1;
-static int init_succeeded = 0;
 
 struct usbdk_device_priv {
 	USB_DK_DEVICE_INFO info;
@@ -200,7 +199,7 @@ static int usbdk_init(struct libusb_context *ctx)
 {
 	int r;
 
-	if ((++concurrent_usage == 0) || !init_succeeded) {
+	if (++concurrent_usage == 0) {
 		r = load_usbdk_helper_dll(ctx);
 		if (r)
 			return r;
@@ -210,8 +209,6 @@ static int usbdk_init(struct libusb_context *ctx)
 		r = windows_common_init(ctx);
 		if (r)
 			goto error_roll_back;
-
-		init_succeeded = 1;
 	}
 
 	return LIBUSB_SUCCESS;
@@ -368,11 +365,10 @@ func_exit:
 
 static void usbdk_exit(void)
 {
-	if ((--concurrent_usage < 0) && init_succeeded) {
+	if (--concurrent_usage < 0) {
 		windows_common_exit();
 		exit_polling();
 		unload_usbdk_helper_dll();
-		init_succeeded = 0;
 	}
 }
 

libusb/version_nano.h

@@ -1 +1 @@
-#define LIBUSB_NANO 11035
+#define LIBUSB_NANO 11036