Fix CID 1393240 (Missing return statement)
Fix CID 1393240 (Missing return statement)

This also fixes a compiler warning:

unittest/progress_test.cc:59:9: warning:
 no return statement in function returning non-void [-Wreturn-type]

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

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