Ocaml Backend generates non-compilable for example C4.cf

[modlfo]

I'm checking the examples and for C4.cf is not possible to compile the generated code. Bnfc is generating for the Print*.ml file something like:

concatD [prtExp0 0 exp0 ; prtOp 0 op ; prtExp0 0 exp]

where 'prtExp0' should be instead 'prtExp'.

If I change manually this code it compiles but the same occurs for the file Show*.ml, it generates

showExp0 instead of showExp

Again, after this changes the code compiles an works. Seems to be just a small bug.