[Po4a-devel] gettextize debian reference

Hi, I'was trying to gettextize an old version of debian reference (sgml), but I got an error: "unrecognized prolog inclusion entity:" Problem was related to inclusion of entities in prolog of main document. I took a look to Sgml.pm code and I found why my input was not cannot be fully expanded. Please check attached patch (it is very stupid) and consider to apply it. Regards, Luca