coverity#1326381 Dereference null return value

Change-Id: I86f5fee9bd77b741536816b6b4d1b6b520acba9e

wizards/com/sun/star/wizards/ui/ButtonList.java

@@ -285,23 +285,25 @@ public class ButtonList implements XItemEventBroadcaster, XActionListener
         }
         for (int i = 0; i < m_aButtons.length; i++)
         {
-            Object[] oResources = renderer.getImageUrls(getObjectFor(i));
-            if (oResources != null)
+            Object oObj = getObjectFor(i);
+            if (oObj == null)
+                continue;
+            Object[] oResources = renderer.getImageUrls(oObj);
+            if (oResources == null)
+                continue;
+            if (oResources.length == 1)
             {
-                if (oResources.length == 1)
-                {
-                    Helper.setUnoPropertyValue(m_aButtons[i].getModel(), PropertyNames.PROPERTY_IMAGEURL, oResources[0]);
-                }
-                else if (oResources.length == 2)
-                {
-                    oUnoDialog.getPeerConfiguration().setImageUrl(m_aButtons[i].getModel(), oResources[0], oResources[1]);
-                }
-                boolean bTabStop = Boolean.TRUE; // focusable ? Boolean.TRUE : Boolean.FALSE;
-                Helper.setUnoPropertyValue(m_aButtons[i].getModel(), "Tabstop", bTabStop);
-                if (refreshOverNull)
-                {
-                    setVisible(m_aButtons[i], true);
-                }
+                Helper.setUnoPropertyValue(m_aButtons[i].getModel(), PropertyNames.PROPERTY_IMAGEURL, oResources[0]);
+            }
+            else if (oResources.length == 2)
+            {
+                oUnoDialog.getPeerConfiguration().setImageUrl(m_aButtons[i].getModel(), oResources[0], oResources[1]);
+            }
+            boolean bTabStop = Boolean.TRUE; // focusable ? Boolean.TRUE : Boolean.FALSE;
+            Helper.setUnoPropertyValue(m_aButtons[i].getModel(), "Tabstop", bTabStop);
+            if (refreshOverNull)
+            {
+                setVisible(m_aButtons[i], true);
             }
         }
     }