utf8.c: Rename macro and move to utf8.h, and use it in regcomp.c

This hides an internal detail

1 files changed, 2 insertions, 0 deletions

diff --git a/utf8.h b/utf8.h
index af2463706b..f5ff61dd4a 100644
--- a/utf8.h
+++ b/utf8.h
@@ -758,6 +758,8 @@ point's representation.
 
 #define UTF8_IS_REPLACEMENT(s, send) is_REPLACEMENT_utf8_safe(s,send)
 
+#define MAX_LEGAL_CP  IV_MAX
+
 /*
 =for apidoc Am|bool|UTF8_IS_SUPER|const U8 *s|const U8 *e