Bluetooth: Fix wrong memcpy size on LE start encryption

This patch fixes wrong memcpy size when copying rand value to
HCI_OP_LE_START_ENC command.
The compiler pretends that the array parameter was declared as a pointer
and sizeof reports the size of the pointer. [1]

[1] http://www.c-faq.com/aryptr/aryparmsize.htmlSigned-off-by: Anderson Briglia <anderson.briglia@openbossa.org>
Signed-off-by: Anderson Lizardo <anderson.lizardo@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

net/bluetooth/hci_conn.c

@@ -218,7 +218,7 @@ void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8],
 	cp.handle = cpu_to_le16(conn->handle);
 	memcpy(cp.ltk, ltk, sizeof(cp.ltk));
 	cp.ediv = ediv;
-	memcpy(cp.rand, rand, sizeof(rand));
+	memcpy(cp.rand, rand, sizeof(cp.rand));
 
 	hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
 }