buf sizes in version.c

there were some 'sizeof buf' on a passed pointer variable buf.
pass the actual buffer size in a second argument.

src/end.c

@@ -762,7 +762,7 @@ dump_everything(
        it's conceivable that the game started with a different
        build date+time or even with an older nethack version,
        but we only have access to the one it finished under */
-    putstr(0, 0, getversionstring(pbuf));
+    putstr(0, 0, getversionstring(pbuf, sizeof pbuf));
     putstr(0, 0, "");
 
     /* game start and end date+time to disambiguate version date+time */