SPR-5802 - NullPointerException when using @CookieValue annotation

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@2544 50f2f4bb-b051-0410-bef5-90022cba6387

org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/mvc/annotation/AnnotationMethodHandlerAdapter.java

@@ -600,9 +600,12 @@ public class AnnotationMethodHandlerAdapter extends PortletContentGenerator impl
 			if (Cookie.class.isAssignableFrom(paramType)) {
 				return cookieValue;
 			}
-			else {
+			else if (cookieValue != null) {
 				return cookieValue.getValue();
 			}
+			else {
+				return null;
+			}
 		}
 
 		@Override