{
UIImage *img = 0;
const char *fn = 0;
- int n = ok ? [d->assets count] : 0;
+ NSUInteger n = ok ? [d->assets count] : 0;
if (n > 0) {
ALAsset *asset = [d->assets objectAtIndex: random() % n];
ALAssetRepresentation *rep = [asset defaultRepresentation];