opencl: Fix runtime crash when no device was found
opencl: Fix runtime crash when no device was found

The native CPU is always available and needs an initialized profile.

Signed-off-by: Stefan Weil <2ce176913f6fa270a32ed69a48d2956bd05e184a@bib.uni-mannheim.de>

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