to handle CDRom devices with no device name
* tests/sexpr2xmltest.c tests/xml2sexprtest.c
tests/sexpr2xmldata/sexpr2xml-no-source-cdrom.sexpr
tests/sexpr2xmldata/sexpr2xml-no-source-cdrom.xml
tests/xml2sexprdata/xml2sexpr-no-source-cdrom.sexpr
tests/xml2sexprdata/xml2sexpr-no-source-cdrom.xml: added regression
tests for this case based on Nobuhiro Itou test inputs.
Daniel