pix_hit : hit-test over user defined hit_areads...
Copyright (c) 2005 Davide Morelli
Copyright (c) 2005-2012 IOhannes m zmölnig

based on:
 GEM - Graphics Environment for Multimedia
 Copyright (C) 1997-2000 Mark Danks, Günter Geiger,
 Copyright (c) 2001-2012 IOhannes m zmölnig
 Copyright (c) 2003-2007 James Tittle II,
 Copyright (c) 2003-2008 Chris Clepper et al.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

In the official GEM distribution, the GNU General Public License is
in the file GnuGPL.LICENSE