Fix potential NPE

diff --git a/eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/editor/definedterm/e4/DefinedTermDropAdapterE4.java b/eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/editor/definedterm/e4/DefinedTermDropAdapterE4.java
index cafc3f80cd8e9582f4e6340891b9af75d7372c05..4f9dff41e699fc41e0471b02970a8c8eeb57f887 100644 (file)
--- a/eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/editor/definedterm/e4/DefinedTermDropAdapterE4.java
+++ b/eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/editor/definedterm/e4/DefinedTermDropAdapterE4.java
@@ -56,7 +56,7 @@ public class DefinedTermDropAdapterE4 extends EditViewerDropAdapter {
 
        @Override
        public boolean performDrop(Object data) {
-           if(StoreUtil.promptCheckIsDirty(editor)){
+           if(StoreUtil.promptCheckIsDirty(editor) || data == null){
                return false;
            }
                AbstractTermDto target = (AbstractTermDto) getCurrentTarget();//can be vocab