Fix version number.
--- mkpwd.c.orig	2012-08-02 10:22:13.000000000 -0500
+++ mkpwd.c	2024-01-08 00:21:04.000000000 -0600
@@ -28,7 +28,7 @@
 #include <errno.h>
 
 const char* PROGRAM	= "mkpwd";
-const char* VERSION	= "0.8";
+const char* VERSION	= "@VERSION@";
 const char* COPYRIGHT	= "(c) 1999-2010 Oliver Schroeder";
 
 /*********************************************************************