remove "using namespace" statements from header files

"using namespace" in headers also affects all files that include the
header which is unwanted and unexpected in most cases.

1 files changed, 2 insertions, 0 deletions

diff --git a/dw/iterator.cc b/dw/iterator.cc
index 6bd950cc..ef37cbc2 100644
--- a/dw/iterator.cc
+++ b/dw/iterator.cc
@@ -22,6 +22,8 @@
 #include "core.hh"
 #include <limits.h>
 
+using namespace lout;
+
 namespace dw {
 namespace core {