opencl: Fix type of parameter for clGetProgramInfo
opencl: Fix type of parameter for clGetProgramInfo

CL_PROGRAM_NUM_DEVICES expects a cl_uint.

Passing size_t results in a wrong value for numDevices on hosts where
sizeof(cl_uint) != sizeof(size_t).

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

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