Fix 1995/cdua under macOS

It took two things: get it to compile and then remove bad function
prototypes which were causing a segfault. It worked under linux and of
course it still does.

1995/cdua/README.md

@@ -11,17 +11,23 @@
 
         make all
 
+[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) fixed this so that it
+would work with macOS. Once it could compile it additionally segfaulted under
+macOS (it did not under linux) which he also fixed. Thank you Cody for your
+assistance!
+
+
 ### To run
 
 	./cdua
 
 ## Judges' comments
 
-    This could be used as the basis of an a-maze-ing screen exerciser.
+This could be used as the basis of an a-maze-ing screen exerciser.
 
 ## Author's comments
 
-   A program that generates a maze, and then solves it, all this being
-   seen by the user.  Some highlights of obfuscation are: 3 steps
-   functions in one - main(), several recursive calls with conditional
-   actions, and just one (big and ugly) statement to solve the maze.
+A program that generates a maze, and then solves it, all this being
+seen by the user.  Some highlights of obfuscation are: 3 steps
+functions in one - main(), several recursive calls with conditional
+actions, and just one (big and ugly) statement to solve the maze.