bindings: xwii_throw_exception must be followed by a return
bindings: xwii_throw_exception must be followed by a return

in iface constructor, the return missing causes to fill the bad errno
because the call to watch was done with a NULL input.

Signed-off-by: Nicolas Adenis-Lamarre <7a9aaf233a184e4d55e18c2d3724ecef73d396e5@gmail.com>

BrainTech/xwiimote-bindings,BrainTech/xwiimote-bindings,barracks510/xwiimote,dvdhrm/xwiimote-bindings,barracks510/xwiimote,barracks510/xwiimote,BrainTech/xwiimote-bindings,barracks510/xwiimote