Ticket #24674: patch_24674.txt

### Eclipse Workspace Patch 1.0
#P JMapViewer
Index: src/org/openstreetmap/gui/jmapviewer/checkBoxTree/CheckBoxTree.java
===================================================================
--- src/org/openstreetmap/gui/jmapviewer/checkBoxTree/CheckBoxTree.java (revision 36495)
+++ src/org/openstreetmap/gui/jmapviewer/checkBoxTree/CheckBoxTree.java (working copy)
@@ -117,13 +117,19 @@
     }
 
     private static Boolean childStatus(DefaultMutableTreeNode node) {
+        int childCount = node.getChildCount();
+        if (childCount == 0) return null;
+        
         Boolean status = data(node.getChildAt(0)).isSelected();
-        for (int i = 1; i < node.getChildCount() && status != null; i++) {
-            if (!status.equals(
-                    data(node.getChildAt(i)).isSelected()
-                    ))
+        
+        for (int i = 1; i < childCount; i++) {
+            Boolean currentStatus = data(node.getChildAt(i)).isSelected();
+            
+            if (!Objects.equals(status, currentStatus)) {
                 return null;
+            }
         }
+            
         return status;
     }