Fix compilation of submatches occurring inside a Kleen star
Fix compilation of submatches occurring inside a Kleen star

Matching ((a)|b)* against string 'ab' was wrongly returning a submatch 'a'

dsheets/ocaml-re,Drup/ocaml-re,dsheets/ocaml-re,bfops/ocaml-re,dsheets/ocaml-re,bfops/ocaml-re,Drup/ocaml-re,bfops/ocaml-re