#10 5.0.4 examples/ppa_1998 old style declarations

[sparvu]

Under ppa_1998/chap2 all .c files must use a new style int main() definition.

Example:

"erlang.c", line 34: warning: old-style declaration or incorrect type for: main
cc -m64 -o closed1 closed1.c -I../../../lib -L../../../lib -lpdq -lm