ext2fs: merge sparse fixes for unicode normalization

ext2fs: merge sparse fixes for unicode normalization

The sparse script complained about the following issues in the kernel
version of this script.  This patch port the fixes to the userspace
version.

sparse warnings: (new ones prefixed by >>)

>> fs/unicode/utf8-norm.c:41:24: sparse: non-ANSI function declaration
   of function 'utf8version_latest'

vim +/utf8version_latest +41 fs/unicode/utf8-norm.c

  40
> 41	int utf8version_latest()
  42	{
  43		return utf8vers;
  44		}
  45	EXPORT_SYMBOL(utf8version_latest);
  46

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>