nextindex.mm

- (NSIndexPath *)nextIndexPath:(NSIndexPath *)i
{
    // apologies to any maintainer but this was some code golf going on in #iphonedev
    id t=_tableView;
    int s,r,n;s=i.section;r=(i.row+1)%[t numberOfRowsInSection:s];n=[t numberOfSections];
    if(!r)for(;s<n&&![t numberOfRowsInSection:s+++1];);
    return s==n?nil:[NSIndexPath indexPathForRow:r inSection:s];
}