Remove the win32 debug channel, misc cleanup of debugging code.

diff --git a/dlls/wintrust/wintrust_main.c b/dlls/wintrust/wintrust_main.c
index 4fb3f10..22ceb51 100644
--- a/dlls/wintrust/wintrust_main.c
+++ b/dlls/wintrust/wintrust_main.c
@@ -27,7 +27,7 @@
 
 #include "wine/debug.h"
 
-WINE_DEFAULT_DEBUG_CHANNEL(win32);
+WINE_DEFAULT_DEBUG_CHANNEL(wintrust);
 
 /***********************************************************************
  *		WinVerifyTrust (WINTRUST.@)