Fix for compilation errors when using zxing-cpp

[wrapperband]

In the class LuminanceSource line 30 has been edited to public variable from private. To fix compile errors with some OSs.

[aidansteele]

Out of interest which OSes are affected? It'd be nice to add them to the test suite so we don't accidentally break them again in the future.

[natedavis]

I am getting this error when I try and compile on Mac OS X - Specifically for a cryptocurrency wallet.

qimagesource.cpp:19:29: error: 'width' is a private member of 'zxing::LuminanceSource'
    ArrayRef<char> mymatrix(width*height);
                            ^
/usr/local/include/zxing/LuminanceSource.h:31:13: note: declared private here
  const int width;
            ^
qimagesource.cpp:19:35: error: 'height' is a private member of 'zxing::LuminanceSource'
    ArrayRef<char> mymatrix(width*height);
                                  ^
/usr/local/include/zxing/LuminanceSource.h:32:13: note: declared private here
  const int height;
            ^
qimagesource.cpp:20:25: error: 'height' is a private member of 'zxing::LuminanceSource'
    for (int y = 0; y < height; y++)
                        ^
/usr/local/include/zxing/LuminanceSource.h:32:13: note: declared private here
  const int height;
            ^
qimagesource.cpp:22:29: error: 'width' is a private member of 'zxing::LuminanceSource'
        for (int x = 0; x < width; x++) {
                            ^
/usr/local/include/zxing/LuminanceSource.h:31:13: note: declared private here
  const int width;
            ^
qimagesource.cpp:23:24: error: 'width' is a private member of 'zxing::LuminanceSource'
            mymatrix[y*width+x] = qGray(image.pixel(x, y));
                       ^
/usr/local/include/zxing/LuminanceSource.h:31:13: note: declared private here
  const int width;
            ^
5 errors generated.

If I change the line 30 to be a public variable, it builds as expected.

[natedavis]

I don't know if it's a specific compile error with zxing, but I do know that if it is a public property, I can compile this program.

[Benjamin-Dobell]

LuminanceSource already has accessors getWidth() and getHeight() please submit a pull request to the project with the offending code.