New debug scheme with explicit debug channels declaration.

diff --git a/windows/class.c b/windows/class.c
index 31689e3..6f7f645 100644
--- a/windows/class.c
+++ b/windows/class.c
@@ -26,6 +26,8 @@
 #include "winerror.h"
 #include "wine/winuser16.h"
 
+DEFAULT_DEBUG_CHANNEL(class)
+
 
 static CLASS *firstClass = NULL;