New debug scheme with explicit debug channels declaration.

diff --git a/scheduler/sysdeps.c b/scheduler/sysdeps.c
index 002462d..764a366 100644
--- a/scheduler/sysdeps.c
+++ b/scheduler/sysdeps.c
@@ -30,6 +30,8 @@
 #include "winbase.h"
 #include "debug.h"
 
+DEFAULT_DEBUG_CHANNEL(thread)
+
 #ifdef linux
 #define HAVE_CLONE_SYSCALL
 #endif