This disables the "max feature size" feature. The current configuration
is totally busted: The max feature size is hard-coded to 2 pixels more
than the user-supplied min feature size which pretty much means you need
to guess the size of the person's face to within a few pixels to get the
code to find it.
https://bugzilla.gnome.org/show_bug.cgi?id=722158
filter->cvStorage, filter->scale_factor, filter->min_neighbors,
filter->flags, cvSize (min_size_width, min_size_height)
#if (CV_MAJOR_VERSION >= 2) && (CV_MINOR_VERSION >= 2)
- , cvSize (min_size_width + 2, min_size_height + 2)
+ , cvSize (0, 0)
#endif
);
}