Fix backtraces on XP
Fix backtraces on XP

The 64 allowed frames on XP *include* CaptureStackBackTrace itself. So reduce it by one.

cgaebel/mordor,mozy/mordor,ccutrer/mordor,mozy/mordor,adfin/mordor,adfin/mordor,adfin/mordor,mtanski/mordor,mtanski/mordor,ccutrer/mordor,ccutrer/mordor,mozy/mordor,cgaebel/mordor,mtanski/mordor