commit c7db59e08ff1dfb30ae4aba8d6274b0cc8a0f228
Author: Anthony Felice <tony.felice@timesys.com>
Date:   Mon Apr 15 19:24:06 2013 -0400

    Update call to mcc_free_buffer to comply with API change.

diff --git a/src/pingpong.c b/src/pingpong.c
index 3d49fc8..5850059 100644
--- a/src/pingpong.c
+++ b/src/pingpong.c
@@ -121,7 +121,7 @@ int main(int argc, char** argv)
        		return 1;
         }
 
-        mcc_free_buffer(null, data);
+        mcc_free_buffer(data);
     }
 
     mcc_destroy(node_num);