added checking of result when building demos

diff --git a/BuildStem.pm b/BuildStem.pm
index 53b52dd..2f9f771 100644 (file)
--- a/BuildStem.pm
+++ b/BuildStem.pm
@@ -48,8 +48,11 @@ sub build_demo_scripts {
     my @files = <bin/demo/*>;
 
     for my $file (@files) {
+
        my $result = $self->copy_if_modified(
                    $file, $demo_dir, 'flatten');
+
+       next unless $result ;
        
        $self->fix_shebang_line($result) if $self->is_unixish();
        $self->make_executable($result);