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, 1 insertions, 0 deletions

diff --git a/dw/layout.cc b/dw/layout.cc
index 2d350a05..3cbc0791 100644
--- a/dw/layout.cc
+++ b/dw/layout.cc
@@ -25,6 +25,7 @@
 #include "../lout/debug.hh"
 #include "../lout/misc.hh"
 
+using namespace lout;
 using namespace lout::container;
 using namespace lout::object;