Revision 14240: 00_HMUARTLGW.pm: check if FD is defined before using it
00_HMUARTLGW.pm: check if FD is defined before using it
Source: Revision 14240: 00_HMUARTLGW.pm: check if FD is defined before using it (http://svn.fhem.de/trac/changeset/14240/trunk)