diff -ur wvstreams-3.75.0/include/wvstring.h wvstreams-3.75.0.new/include/wvstring.h

--- wvstreams-3.75.0/include/wvstring.h	2004-03-13 19:59:36.000000000 +0100

+++ wvstreams-3.75.0.new/include/wvstring.h	2004-07-28 15:32:50.236903510 +0200

@@ -18,6 +18,7 @@

 #include <string.h>

 #include <stdio.h>

 #include <stdlib.h>

+#include <stddef.h>

 /*

@@ -66,7 +67,7 @@

 // the _actual_ space taken by a WvStringBuf, without the data[] array

 // (which is variable-sized, not really 1 byte)

-#define WVSTRINGBUF_SIZE(s) (s->data - (char *)s)

+#define WVSTRINGBUF_SIZE(s) (offsetof(struct WvStringBuf, data))

 /**

  * A WvFastString acts exactly like a WvString, but can take (const char *)