HID: wacom: Reset stylus buttons - Intuos4 WL

Stylus buttons have to be resetted when going out-of-prox.
Signed-off-by: NPrzemo Firszt <przemo@firszt.eu>
Reviewed-by: NJason Gerecke <killertofu@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

drivers/hid/hid-wacom.c

@@ -352,6 +352,8 @@ static void wacom_i4_parse_pen_report(struct wacom_data *wdata,
 	case 0x80: /* Out of proximity report */
 		input_report_key(input, BTN_TOUCH, 0);
 		input_report_abs(input, ABS_PRESSURE, 0);
+		input_report_key(input, BTN_STYLUS, 0);
+		input_report_key(input, BTN_STYLUS2, 0);
 		input_report_key(input, wdata->tool, 0);
 		input_report_abs(input, ABS_MISC, 0);
 		input_event(input, EV_MSC, MSC_SERIAL, wdata->serial);