Fix memset in kenwood.c

kenwood/kenwood.c

@@ -439,7 +439,7 @@ int kenwood_safe_transaction(RIG *rig, const char *cmd, char *buf,
   int err;
   int retry = 0;
 
-  memset(buf,buf_size,0);
+  memset(buf,0, buf_size);
 
   if (expected == 0)
     buf_size = 0;