[Minor] Fix build with older icu

diff --git a/src/libutil/cxx/utf8_util.cxx b/src/libutil/cxx/utf8_util.cxx
index 9343ab4c43e23f040bb428df15f298ab19c6777b..337961f2bb835e1c21302178807a06ad7de4d9c2 100644 (file)
--- a/src/libutil/cxx/utf8_util.cxx
+++ b/src/libutil/cxx/utf8_util.cxx
@@ -143,7 +143,7 @@ rspamd_normalise_unicode_inplace(char *start, size_t *len)
                        }
                        else {
                                UBool err = 0;
-                               U8_APPEND(start, i, *len, uc, err);
+                               U8_APPEND((uint8_t*)start, i, *len, uc, err);
 
                                if (err) {
                                        ret = RSPAMD_UNICODE_NORM_ERROR;