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39271b4fe5
Convert enrollment function to return a signed integer, which is negative on error or corresponds into fp_enroll_result otherwise. Now we can treat a 'FAIL' condition differently from an actual error: fail means that enrollment didn't complete because the data was nonsense or whatever (e.g. scanned a different finger for each stage?). Updated upekts accordingly.
libfprint http://www.reactivated.net/fprint libfprint is primarily licensed under the GNU LGPL. HOWEVER, THIS PRERELEASE VERSION INCLUDES GPL CODE FROM LIBTHINKFINGER, therefore distribution is subject to both the terms of the LGPL (see COPYING) *and* the GPL (see COPYING.GPL). At release time, I will contact libthinkfinger authors and see if they will be happy to relicense. I expect they will.