fix charset issues when reading a document

The DocumentInputStream introduced with commit
a9fea11aaffabf69d1a3d7d7c060889a70bef64c did not handle UTF-8.

Change-Id: I25bf404bd003e4aea517f1a0c7abfb8f929fe3ec
Signed-off-by: Carsten Hiesserich <carsten.hie@gmail.com>
1 file changed