[ocrfeeder] Fix unicode problems when generating a plain text file

[Joaquim Manuel Pereira Rocha <jrocha src gnome org>]

commit 691f54618ed17a2553f154af07a6cfb4bf887e09
Author: Joaquim Rocha <me joaquimrocha com>
Date:   Sat Apr 30 16:55:17 2016 +0200

    Fix unicode problems when generating a plain text file
    
    gb#765847

 src/ocrfeeder/feeder/documentGeneration.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/ocrfeeder/feeder/documentGeneration.py b/src/ocrfeeder/feeder/documentGeneration.py
index fa76060..51037af 100644
--- a/src/ocrfeeder/feeder/documentGeneration.py
+++ b/src/ocrfeeder/feeder/documentGeneration.py
@@ -358,7 +358,7 @@ class PlaintextGenerator(DocumentGenerator):
         self.text = ''
 
     def addText(self, newText):
-        self.text += newText
+        self.text += unicode(newText, 'utf-8')
 
     def addPage(self, page):
         self.addText(page.getTextFromBoxes())