fixes issue 500 + only disable redzone for _dbg routine set itself, not all sets   in same module
fixes issue 500
+ only disable redzone for _dbg routine set itself, not all sets
  in same module

SVN-Revision: 617

LohithBlaze/drmemory,sigma-random/drmemory,code4bones/drmemory,sigma-random/drmemory,code4bones/drmemory,code4bones/drmemory,LohithBlaze/drmemory,LohithBlaze/drmemory,sigma-random/drmemory,LohithBlaze/drmemory,code4bones/drmemory,sigma-random/drmemory,code4bones/drmemory,LohithBlaze/drmemory,sigma-random/drmemory