[1.0.X] Fixed #9259 -- Fixed a validation error for Spanish identity card numbers.

Patch from Marc Garcia.

Backport of r9129 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@9130 bcc190cf-cafb-0310-a4f2-bffc1f526a37