Remove unneeded value.

Spotted by:	scan-build

src/dccutil.cc

@@ -1017,8 +1017,6 @@ identd_open(const char *sourceIp, const char *destIp, int identd)
       if (dcc[idx].type == &DCC_IDENTD_CONNECT)
         return;                   /* it's already open :) */
 
-    idx = -1;
-
     identd_hack = 1;
 #ifdef USE_IPV6
     i = open_listen_by_af(&port, AF_INET6);