Bug#939477: incomplete copyright file, and copyright file includes null characters

[Matthias Klose]

Package: src:emscripten
Version: 1.22.1-1
Severity: serious
Tags: sid bullseye

Apparently this is an autogenerated file, however the license for
tests/sdl_canvas_palette_g.png is bogus and contains null characters (which at 
least chokes launchpad when trying to upload.

Also the file seems to be incomplete, at least the freetype copyrights don't 
list any copyright holder, all lines look like

Copyright: 1996-2000, 2002, 2004, 2006 by
   1996-2000, 2002, 2004, 2006, 2008, by
   1996-2000, 2002, 2006, by

I didn't check further, if anything else is missing.