Bug#783824: pd-chaos: FTBFS on arm64

[Edmund Grimley Evans]

Source: pd-chaos
Version: 0.2-1

It failed to build on arm64. The error was:

cc -I"/usr/include/pd" -DPD -DVERSION='"0.2"' -fPIC -Wall -W -g -O6
-funroll-loops -fomit-frame-pointer -o "libchaos.o" -c "libchaos.c"
libchaos.c: In function 'lyapunov_eval':
libchaos.c:29:3: error: too many arguments to function 'calc'
   calc(fractal, vars);
   ^
libchaos.c:30:3: error: too many arguments to function 'calc'
   calc(fractal, test);
   ^

See aarch64-specific definition of t_gotfn in /usr/include/pd/m_pd.h.
However, the comment there might be misleading and this could be a bug
in "puredata".