fixes issue 584 + take extra time to calculate at beginning whether each item is   line-final, to avoid trailing whitespace at end of callstack frames
fixes issue 584
+ take extra time to calculate at beginning whether each item is
  line-final, to avoid trailing whitespace at end of callstack frames

SVN-Revision: 536

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