[1.3.X] Fixed #15848 -- Fixed regression introduced in [15882] in makemessages...

[1.3.X] Fixed #15848 -- Fixed regression introduced in [15882] in makemessages management command when processing multi-line comments that contain non-ASCCI characters in templates. Thanks for the report Denis Drescher.

Backport of r16038/r16039 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.3.X@16040 bcc190cf-cafb-0310-a4f2-bffc1f526a37