Also fixed bug which prevented .cxx and .hxx files listing

Change-Id: I67adc7c52ab5f2f1222e0756cd0087c8d9be102f
Reviewed-on: https://gerrit.libreoffice.org/38640Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>