staging: vt6655: fix assignment of bool to 0

This patch fixes the following warnings detected using coccinelle for
drivers/staging/wmgr.c file:

drivers/staging/vt6655/wmgr.c:2335:1-22: WARNING: Assignment of bool to 0/1
drivers/staging/vt6655/wmgr.c:2338:1-27: WARNING: Assignment of bool to 0/1

Signed-off-by: Teodora Baluta <teobaluta@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>