Allow MICRO and WIN32 code paths to diverge

There's still a lot of overlap for 3.4.1, but not
100% any longer and it facilitates some improvements
- Allow error save files on WIN32

src/topten.c

@@ -37,7 +37,7 @@ static long final_fpos;
 #define POINTSMIN	1	/* must be > 0 */
 #define ENTRYMAX	100	/* must be >= 10 */
 
-#if !defined(MICRO) && !defined(MAC)
+#if !defined(MICRO) && !defined(MAC) && !defined(WIN32)
 #define PERS_IS_UID		/* delete for PERSMAX per name; now per uid */
 #endif
 struct toptenentry {