#261 VQB panel hint rendering fix

plugins/org.jkiss.dbeaver.ext.erd/src/org/jkiss/dbeaver/ext/erd/editor/ERDEditorPart.java

@@ -1185,7 +1185,7 @@ public abstract class ERDEditorPart extends GraphicalEditorWithFlyoutPalette
         public void completeLoading(EntityDiagram result) {
             super.completeLoading(result);
             super.visualizeLoading();
-            if (!result.getEntities().isEmpty()) {
+            if (result != null && !result.getEntities().isEmpty()) {
                 setErrorMessage(null);
             }
             getGraphicalViewer().setContents(result);

plugins/org.jkiss.dbeaver.ext.erd/src/org/jkiss/dbeaver/ext/erd/figures/EntityDiagramFigure.java

@@ -78,9 +78,9 @@ public class EntityDiagramFigure extends FreeformLayer {
                         //setConstraint(hintFigure, );
                     } else {
                         hintFigure.setVisible(false);
+                        EntityDiagramFigure.this.removeFigureListener(this);
                     }
                 }
-                EntityDiagramFigure.this.removeFigureListener(this);
             }
         });
     }