Fix cppcheck warnings

rigs/elad/elad.c

@@ -3683,6 +3683,7 @@ DECLARE_PROBERIG_BACKEND(elad)
     int retval = -1;
     int rates[] = { 115200, 57600, 38400, 19200, 9600, 4800, 1200, 0 }; /* possible baud rates */
     int rates_idx;
+    idbuf[0] = 0;
 
     rig_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);