Avoid package-local access

It was clearly intended to be private.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

src/main/java/org/scijava/welcome/DefaultWelcomeService.java

@@ -69,7 +69,7 @@ public class DefaultWelcomeService extends AbstractService implements
 	private AppService appService;
 
 	@Parameter
-	DisplayService displayService;
+	private DisplayService displayService;
 
 	@Parameter
 	private CommandService commandService;