Staging: hv: mousevsc: Correctly initialize the header size

Correctly initialize the header size.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/hv_mouse.c

@@ -590,7 +590,7 @@ static int mousevsc_connect_to_vsp(struct hv_device *device)
 	request->size = sizeof(struct synthhid_protocol_request);
 
 	request->request.header.type = SynthHidProtocolRequest;
-	request->request.header.size = sizeof(unsigned long);
+	request->request.header.size = sizeof(unsigned int);
 	request->request.version_requested.version = SYNTHHID_INPUT_VERSION;
 
 	pr_info("synthhid protocol request...");