*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
+ * the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
#include <gr_null_source.h>
#include <gr_io_signature.h>
+#include <string.h>
gr_null_source::gr_null_source (size_t sizeof_stream_item)
: gr_sync_block ("null_source",