New debug scheme with explicit debug channels declaration.

diff --git a/dlls/comctl32/header.c b/dlls/comctl32/header.c
index 45edb5b..82fe395 100644
--- a/dlls/comctl32/header.c
+++ b/dlls/comctl32/header.c
@@ -26,6 +26,8 @@
 #include "header.h"
 #include "debug.h"
 
+DEFAULT_DEBUG_CHANNEL(header)
+
 
 #define __HDM_LAYOUT_HACK__