use of uninitialized value

[OznOg]

introduced in 37e0a0c

the value of retval is returned not initialized when case 2
in kernel/hypercalls.c line 504

int hyp_cpuctrl(void)
{
        unsigned long cp;
        unsigned long retval;

        deb_printf(DEB_CALL, "BEGIN\n");
        cp = (int) _context->regs.regs[0];
        switch (cp) {
        case 0:
                retval = _get_c0();
                break;
        case 1:
                retval = _get_c1();
                break;
        case 2:
                break;
        }
        deb_printf(DEB_HYP, "END: 0x%08x\n", retval);
        return retval;
}