pp.c, pp_sys.c: Use DO_UTF8 instead of its expansion

We have a macro to hide the details of this; use it

1 files changed, 1 insertions, 1 deletions

diff --git a/pp_sys.c b/pp_sys.c
index e28e8906f1..304e1b50f8 100644
--- a/pp_sys.c
+++ b/pp_sys.c
@@ -1736,7 +1736,7 @@ PP(pp_sysread)
     }
     else {
 	buffer = SvPV_force(bufsv, blen);
-	buffer_utf8 = !IN_BYTES && SvUTF8(bufsv);
+	buffer_utf8 = DO_UTF8(bufsv);
     }
     if (DO_UTF8(bufsv)) {
 	blen = sv_len_utf8_nomg(bufsv);