This patch converts some int or unsigned int block number definitions to 
blk_t type.  Most conversions are necessary for 64-bit porting.

Changes from the previous version:
- Fix errors found in the test suite "make check"

  debugfs/debugfs.c       |   12 +++++-------
  debugfs/logdump.c       |   10 +++++-----
  e2fsck/super.c          |    6 ++++--
  lib/e2p/e2p.h           |    2 +-
  lib/e2p/percent.c       |    2 +-
  lib/ext2fs/bitops.h     |    2 +-
  lib/ext2fs/closefs.c    |    7 +++----
  lib/ext2fs/ext2fs.h     |    2 +-
  lib/ext2fs/gen_bitmap.c |    2 +-
  lib/ext2fs/openfs.c     |    3 +--
  lib/ext2fs/res_gdt.c    |    3 ++-
  resize/resize2fs.c      |    7 ++++---
  12 files changed, 29 insertions(+), 29 deletions(-)