ChangeLog, e2fsck.h, pass4.c, super.c:

ChangeLog, e2fsck.h, pass4.c, super.c:
  super.c, e2fsck.h: Always declare e2fsck_get_device_size() as an
  	extern in e2fsck.h to prevent -Wall warnings.
  pass4.c (e2fsck_pass4): Remove unused variable 'j'.
  super.c (check_super_block): Fix broken superblock sanity check when
  	calculating blocks_per_group if s_log_frag_size != s_log_block_size.
  	Since we don't support fragments, this isn't a bug deal, but it's good
  	to get it fixed.
ChangeLog, Makefile.elf-lib:
  Makefile.elf-lib (installdirs): Change use of DLL_INSTALL_DIR to
  	ELF_INSTALL_DIR.  (Doesn't make a difference currently, but it's
  	correct this way.)
ChangeLog, fgetversion.c, getversion.c:
  getversion.c (getversion): Return 0 if there's no error.
  fgetversion.c (fgetversion): Pass the address of the temporary
  	variable instead of the unitialized variable to the
  	EXT2_IOC_GETVERSION ioctl.