Fix PR#6174 (non -rectypes)

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@14246 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Fix PR#6174 (-rectypes case)

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@14248 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02