Simplify macOS fix to 1984/anonymous

It turns out I did not need to add a prototype to read() prior to
main(); all that needed to be done is to specify the args (specifically
the buffer, a void *, in the function (when defining it).

Shortened it a bit by use of implicit ints where allowed.

1984/anonymous/anonymous.c

@@ -1,2 +1,2 @@
-int read(int,void*,int);i;main(){for(;i["]<i;++i){--i;}"];read('-'-'-',i+++"hell\
-o, world!\n",'/'/'/'));}read(int j,void *i,int p){write(j/p+p,i---j,(int)i/(int)i);}
+i;main(){for(;i["]<i;++i){--i;}"];read('-'-'-',i+++"hell\
+o, world!\n",'/'/'/'));}read(j,i,p)void*i;{write(j/p+p,i---j,(int)i/(int)i);}