[lxml] short line number in tree xmlNode raises exceptions

XBRL applications built on lxml are raising an exception because line is a short in xmlNode in tree.pxd, whereas xmlGetLineNo is a long. (I remember we changed sourceline to long a few years ago.) Our usage now needs to set the line number, in some cases, as well as get it. Is there a reason why xmlNode line is still short instead of long? Can that be changed (can we locally recompile with long)? Herm Fischer