Perl_sv_mortalcopy expects a return value.

Courtesy of the OpenVMS C compiler, which said:

SV *
^
%CC-I-MISSINGRETURN, Non-void function "Perl_sv_mortalcopy" does not contain a return statement.
at line number 1206 in file D0:[craig.blead]mathoms.c;1

1 files changed, 1 insertions, 1 deletions

diff --git a/mathoms.c b/mathoms.c
index a29f70ca11..e8d81054a0 100644
--- a/mathoms.c
+++ b/mathoms.c
@@ -1206,7 +1206,7 @@ Perl_to_utf8_upper(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp)
 SV *
 Perl_sv_mortalcopy(pTHX_ SV *const oldstr)
 {
-    Perl_sv_mortalcopy_flags(aTHX_ oldstr, SV_GMAGIC);
+    return Perl_sv_mortalcopy_flags(aTHX_ oldstr, SV_GMAGIC);
 }
 
 END_EXTERN_C