Impact: define first occurence of variable 'nskb' in inner most possible scope
Fix this sparse warning:
  drivers/isdn/mISDN/dsp_core.c:746:20: warning: symbol 'nskb' shadows an earlier one
  drivers/isdn/mISDN/dsp_core.c:634:19: originally declared here
Signed-off-by: Hannes Eder <hannes@hanneseder.net>
Acked-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
        int                     ret = 0;
        u8                      *digits;
        int                     cont;
-       struct                  sk_buff *nskb;
        u_long                  flags;
 
        hh = mISDN_HEAD_P(skb);
                        digits = dsp_dtmf_goertzel_decode(dsp, skb->data,
                                skb->len, (dsp_options&DSP_OPT_ULAW)?1:0);
                        while (*digits) {
+                               struct sk_buff *nskb;
                                if (dsp_debug & DEBUG_DSP_DTMF)
                                        printk(KERN_DEBUG "%s: digit"
                                            "(%c) to layer %s\n",