patch for re.sub bug, by AMK.
diff --git a/Modules/pcre.h b/Modules/pcre.h
index e914084..4a01bd2 100644
--- a/Modules/pcre.h
+++ b/Modules/pcre.h
@@ -57,11 +57,13 @@
#ifdef FOR_PYTHON
extern pcre *pcre_compile(const char *, int, const char **, int *, PyObject *);
+extern int pcre_exec(const pcre *, const pcre_extra *, const char *,
+ int, int, int, int *, int);
#else
extern pcre *pcre_compile(const char *, int, const char **, int *);
-#endif
extern int pcre_exec(const pcre *, const pcre_extra *, const char *,
int, int, int *, int);
+#endif
extern int pcre_info(const pcre *, int *, int *);
extern pcre_extra *pcre_study(const pcre *, int, const char **);
extern const char *pcre_version(void);