getLangNames and getMappedFileNames don't work

Hello,

unfortunately the methods getLangNames and getMappedFileNames don't return anything.

my $h = Syntax::SourceHighlight->new();
my $lm = Syntax::SourceHighlight::LangMap->new();
my $langs = $lm->getLangNames();
print @$langs; # $langs is empty :-(

Thanks in advance, Max