btl/ugni: fix a typo in r30353

cmr=v1.7.5:ticket=trac:4151

This commit was SVN r30354.

The following SVN revision numbers were found above:
  r30353 --> open-mpi/ompi@aa3fea55b2

The following Trac tickets were found above:
  Ticket 4151 --> https://svn.open-mpi.org/trac/ompi/ticket/4151

ompi/mca/btl/ugni/btl_ugni_prepare.h

@@ -32,8 +32,7 @@ mca_btl_ugni_prepare_src_send_nodata (struct mca_btl_base_module_t *btl,
         return NULL;
     }
 
-    BTL_VERBOSE(("preparing src for send fragment. size = %u",
-                 (unsigned int)(*size + reserve)));
+    BTL_VERBOSE(("preparing src for send fragment. size = %u", (unsigned int) reserve));
 
     frag->hdr_size = reserve + sizeof (frag->hdr.send);