SIS USB2VGA Warning fix

drivers/usb/misc/sisusbvga/sisusb_con.c:1436: warning: initialization from incompatible pointer type

Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/usb/misc/sisusbvga/sisusb_con.c

@@ -321,7 +321,7 @@ sisusbcon_deinit(struct vc_data *c)
 /* interface routine */
 static u8
 sisusbcon_build_attr(struct vc_data *c, u8 color, u8 intensity,
-			    u8 blink, u8 underline, u8 reverse)
+			    u8 blink, u8 underline, u8 reverse, u8 unused)
 {
 	u8 attr = color;