Many files:

Many files:
  rw_bitmaps.c: Fixed signed/unsigned warnings.
  fileio.c (ext2fs_file_set_size): Remove unneeded extern from the
  	function declaration.
  dblist.c (make_dblist): Add safety check in case the dblist pointer
  	passed in is null (in which case, assign it to fs->dblist).  Fixed
  	some signed/unsigned warnings.
  bmap.c: Make addr_per_block be of type blk_t to avoid signed/unsigned
  	warnings.
  namei.c (ext2fs_follow_link): Remove uneeded extern from the function
  	declaration.
  get_pathname.c (get_pathname_proc): Use return value from
  	ext2fs_get_mem, instead of checking if &gp->name is NULL.
  dir_iterate.c (ext2fs_process_dir_block):
  dblist_dir.c (ext2fs_dblist_dir_iterate): Remove uneeded extern from
  	the function declaration.
  block.c (ext2fs_block_iterate2): If the read_inode call fails, return
  	the error directly instead of jumping to the cleanup routine, since we
  	don't need to do any cleanup.
  alloc_table.c (ext2fs_allocate_group_table): Make this function take a
  	dgrp_t for its group argument.
  ext2fs.h: Make dgrp_t an __u32 type, and make fs->desc_group_count be
  	of type dgrp_t.