fix reversed memset arguments in hv_mouse

[Dave Jones <davej@redhat.com>]

size is 3rd arg, not the 2nd.

Signed-off-by: Dave Jones <davej@redhat.com>

diff --git a/drivers/staging/hv/hv_mouse.c b/drivers/staging/hv/hv_mouse.c
index 50147f8..cbe5686 100644
--- a/drivers/staging/hv/hv_mouse.c
+++ b/drivers/staging/hv/hv_mouse.c
@@ -374,7 +374,7 @@ static void MousevscOnReceiveDeviceInfo(struct mousevsc_dev *InputDevice, struct
 	       desc->desc[0].wDescriptorLength);
 
 	/* Send the ack */
-	memset(&ack, sizeof(struct mousevsc_prt_msg), 0);
+	memset(&ack, 0, sizeof(struct mousevsc_prt_msg));
 
 	ack.type = PipeMessageData;
 	ack.size = sizeof(struct synthhid_device_info_ack);
@@ -595,7 +595,7 @@ static int MousevscConnectToVsp(struct hv_device *Device)
 	/*
 	 * Now, initiate the vsc/vsp initialization protocol on the open channel
 	 */
-	memset(request, sizeof(struct mousevsc_prt_msg), 0);
+	memset(request, 0, sizeof(struct mousevsc_prt_msg));
 
 	request->type = PipeMessageData;
 	request->size = sizeof(struct synthhid_protocol_request);