Is there a bug in dngShow.m?

Hi, 

Is there a bug here?
```
    case 'grbg'
        colormask(1:2:end,2:2:end) = wbmults(1);    %r
        colormask(1:2:end,2:2:end) = wbmults(3);    %b
```

Shouldn't it be ```colormask(2:2:end,1:2:end) = wbmults(3);    %b```? Thanks!