Scala: Stylistic improvements.

Change-Id: I6f6cc25dd432d43e89e7bb54fa101be9da157754
diff --git a/src/main/scala/eu/mulk/mulkcms2/cms/about/AboutResource.scala b/src/main/scala/eu/mulk/mulkcms2/cms/about/AboutResource.scala
index 0d70f53..9cbe1b0 100644
--- a/src/main/scala/eu/mulk/mulkcms2/cms/about/AboutResource.scala
+++ b/src/main/scala/eu/mulk/mulkcms2/cms/about/AboutResource.scala
@@ -12,10 +12,10 @@
 class AboutResource {
 
   @ResourcePath("benki/about/index.html")
-  var index: Template = null;
+  var index: Template = _
 
   @GET
   @Produces(Array(MediaType.TEXT_HTML))
-  def getIndex(): TemplateInstance =
-    index.instance();
+  def getIndex: TemplateInstance =
+    index.instance()
 }