Patch for NPE when Ctrl-click a url in the xml editor by Panagiotis Korros
diff --git a/bundles/org.eclipse.wst.sse.ui/src/org/eclipse/wst/sse/ui/internal/openon/OpenOnBuilder.java b/bundles/org.eclipse.wst.sse.ui/src/org/eclipse/wst/sse/ui/internal/openon/OpenOnBuilder.java
index c67aaaa..5c56d12 100644
--- a/bundles/org.eclipse.wst.sse.ui/src/org/eclipse/wst/sse/ui/internal/openon/OpenOnBuilder.java
+++ b/bundles/org.eclipse.wst.sse.ui/src/org/eclipse/wst/sse/ui/internal/openon/OpenOnBuilder.java
@@ -193,6 +193,8 @@
 	 */
 	public OpenOnDefinition[] getOpenOnDefinitions() {
 		initCache();
+		if( fOpenOnDefs == null )
+			fOpenOnDefs = new ArrayList();
 		return (OpenOnDefinition[]) fOpenOnDefs.toArray(new OpenOnDefinition[fOpenOnDefs.size()]);
 	}