Issue #529: inside main() use return rather than exit
Issue #529: inside main() use return rather than exit

tesseract-ocr/tesseract,jbarlow83/tesseract,stweil/tesseract,amitdo/tesseract,jbarlow83/tesseract,UB-Mannheim/tesseract,tesseract-ocr/tesseract,amitdo/tesseract,amitdo/tesseract,jbarlow83/tesseract,UB-Mannheim/tesseract,UB-Mannheim/tesseract,amitdo/tesseract,jbarlow83/tesseract,stweil/tesseract,UB-Mannheim/tesseract,stweil/tesseract,tesseract-ocr/tesseract,amitdo/tesseract,stweil/tesseract,tesseract-ocr/tesseract,jbarlow83/tesseract,tesseract-ocr/tesseract,stweil/tesseract,UB-Mannheim/tesseract