Fix two warnings:
af9033.c: In function 'af9033_read_status':
af9033.c:883:25: warning: 'snr_lut' may be used uninitialized in this function [-Wmaybe-uninitialized]
   const struct val_snr *snr_lut;
                         ^
af9033.c:952:25: warning: 'tmp' may be used uninitialized in this function [-Wmaybe-uninitialized]
   c->cnr.stat[0].svalue = tmp;
                         ^
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
 {
        struct af9033_dev *dev = fe->demodulator_priv;
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
-       int ret, i, tmp;
+       int ret, i, tmp = 0;
        u8 u8tmp, buf[7];
 
        dev_dbg(&dev->client->dev, "\n");
        /* CNR */
        if (dev->fe_status & FE_HAS_VITERBI) {
                u32 snr_val, snr_lut_size;
-               const struct val_snr *snr_lut;
+               const struct val_snr *snr_lut = NULL;
 
                /* read value */
                ret = af9033_rd_regs(dev, 0x80002c, buf, 3);