New debug scheme with explicit debug channels declaration.

diff --git a/windows/syscolor.c b/windows/syscolor.c
index 71254fd..f06db7e 100644
--- a/windows/syscolor.c
+++ b/windows/syscolor.c
@@ -16,6 +16,8 @@
 #include "winreg.h"
 #include "winversion.h"
 
+DEFAULT_DEBUG_CHANNEL(syscolor)
+
 static const char * const DefSysColors[] =
 {
     "Scrollbar", "224 224 224",      /* COLOR_SCROLLBAR           */