Use "C" locale for ALTO output
Use "C" locale for ALTO output

This fixes wrong output of integers with locale de_DE.UTF-8:

    - <Page WIDTH="2.481" HEIGHT="3.508" PHYSICAL_IMG_NR="0" ID="page_0">
    + <Page WIDTH="2481" HEIGHT="3508" PHYSICAL_IMG_NR="0" ID="page_0">

Signed-off-by: Stefan Weil <8d4c780fcfdc41841e5070f4c43da8958ba6aec0@weilnetz.de>

tesseract-ocr/tesseract,stweil/tesseract,stweil/tesseract,UB-Mannheim/tesseract,stweil/tesseract,amitdo/tesseract,stweil/tesseract,amitdo/tesseract,tesseract-ocr/tesseract,UB-Mannheim/tesseract,stweil/tesseract,tesseract-ocr/tesseract,tesseract-ocr/tesseract,UB-Mannheim/tesseract,tesseract-ocr/tesseract,amitdo/tesseract,amitdo/tesseract,UB-Mannheim/tesseract,UB-Mannheim/tesseract,amitdo/tesseract