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/README.md

@@ -11,14 +11,15 @@
 
 	make all
 
-NOTE: this entry will likely dump core with arm64 chips. We could get it to work
-with modern systems with x86_64 but systems but at least with macOS arm64
-this program dumps core. We could not test Intel Macs.
 
 ## Try:
 
 	./paul
 
+[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) fixed a segfault under
+macOS. The problem was that the int (from `#define f`) should be a long. This
+became apparent when he was using lldb and saw that the type of a pointer was
+long. Thank you Cody for your assistance!
 
 ## Judges' comments: