From 4827d155bcad9ee39bf850466d4970c18fd1a94a Mon Sep 17 00:00:00 2001
From: David Tardon <dtardon@redhat.com>
Date: Thu, 23 Jul 2015 13:44:14 +0200
Subject: [PATCH] fix build

---
 host/lib/usrp/b200/b200_io_impl.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/host/lib/usrp/b200/b200_io_impl.cpp b/host/lib/usrp/b200/b200_io_impl.cpp
index 262c95f..c228637 100644
--- a/host/lib/usrp/b200/b200_io_impl.cpp
+++ b/host/lib/usrp/b200/b200_io_impl.cpp
@@ -184,7 +184,7 @@ boost::optional<uhd::msg_task::msg_type_t> b200_impl::handle_async_task(
 {
     managed_recv_buffer::sptr buff = xport->get_recv_buff();
     if (not buff or buff->size() < 8)
-        return NULL;
+        return boost::none;
 
     const boost::uint32_t sid = uhd::wtohx(buff->cast<const boost::uint32_t *>()[1]);
     switch (sid) {
@@ -248,7 +248,7 @@ boost::optional<uhd::msg_task::msg_type_t> b200_impl::handle_async_task(
     default:
         UHD_MSG(error) << "Got a ctrl packet with unknown SID " << sid << std::endl;
     }
-    return NULL;
+    return boost::none;
 }
 
 /***********************************************************************
-- 
2.1.0