Fix segfault in macOS with 1989/paul

The problem was that the int * needed to be a long *. It became apparent
to me when evaluating it with lldb as I noticed a pointer was long, not
an int. This does not cause a problem with linux. I have no 32-bit
system to test but I don't believe this will be an actual problem.

1989/paul/paul.c

@@ -1,5 +1,5 @@
 #include <stdio.h>
-#define f int
+#define f long
 #define v (void)printf(
 #define x ),exit(1);
 #define y ){if(n)c=z(n,u),u=n,n=c;o[i]=n?'0'+(1&*n):'0';}