fix -DPERL_GLOBAL_STRUCT builds broken with the hash merge

note: this failed to build in smoke-me eg.
http://perl.develop-help.com/raw/?id=131750

1 files changed, 1 insertions, 0 deletions

diff --git a/hv.c b/hv.c
index 3069e67bf4..c34d4d395d 100644
--- a/hv.c
+++ b/hv.c
@@ -2638,6 +2638,7 @@ Perl_share_hek(pTHX_ const char *str, I32 len, register U32 hash)
          we should flag that it needs upgrading on keys or each.  Also flag
          that we need share_hek_flags to free the string.  */
       if (str != save) {
+          dVAR;
           PERL_HASH(hash, str, len);
           flags |= HVhek_WASUTF8 | HVhek_FREEKEY;
       }