fix typo in previous regex.h patch

[Paul Eggert]

I installed this as well:

2005-08-24  Paul Eggert  <address@hidden>

        * lib/regex.h [_REGEX_SOURCE]: Define re_fastmap_accurate too;
        this was inadvertently omitted from the previous patch.

--- lib/regex.h.~1.31.~ 2005-08-24 14:10:42.000000000 -0700
+++ lib/regex.h 2005-08-24 16:01:12.000000000 -0700
@@ -630,6 +630,7 @@ extern void regfree (regex_t *__preg);
 # define re_buffer buffer
 # define re_can_be_null can_be_null
 # define re_fastmap fastmap
+# define re_fastmap_accurate fastmap_accurate
 # define re_newline_anchor newline_anchor
 # define re_no_sub no_sub
 # define re_not_bol not_bol