avoid an undef comparison warning

shawnlaffan · Feb 5, 2024 · 41359af · 41359af
1 parent 664d621
commit 41359af
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/Biodiverse/GUI/Tabs/Spatial.pm b/lib/Biodiverse/GUI/Tabs/Spatial.pm
@@ -1143,7 +1143,7 @@ sub on_selected_phylogeny_changed {
     my $dendro_tree = $self->{dendrogram}->get_cluster;
 
     #  don't trigger needless redraws
-    return if refaddr ($phylogeny) == refaddr ($dendro_tree);
+    return if ($dendro_tree && $phylogeny) && refaddr ($phylogeny) == refaddr ($dendro_tree);
 
     if ($self->{dendrogram}) {
         $self->{dendrogram}->clear;