Check that pango's suggested font name is not an empty string
Check that pango's suggested font name is not an empty string

On msys2 pango seems to always returns empty string for the suggested
font. It's a good idea to check that the string is not empty before
printing it - on all platforms.

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