Set Toolbar style so button labels are displayed again (thanks Alan Fitton).

If you see empty button labels instead of "Next slide" etc with
recent versions of Perl Gtk2, then you need this patch.

diff --git a/techtalk-pse.pl b/techtalk-pse.pl
index 8b7f544..843f6c7 100755 (executable)
--- a/techtalk-pse.pl
+++ b/techtalk-pse.pl
@@ -424,6 +424,7 @@ sub make_button_bar
     my %params = @_;
 
     my $bbox = Gtk2::Toolbar->new ();
+    $bbox->set_style ("GTK_TOOLBAR_TEXT");
 
     my $i = 0;