PR#5986 continued: check string and array lengths if Compat_32 requested.


git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@13724 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Better error messages for binary/octal/hexa integer scanning.

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@13725 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02