Use switch with init-statement

Change-Id: Iac45bd7f50e9f9e82c5dad25983f4b32515c4816
Reviewed-on: https://gerrit.libreoffice.org/64815
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

accessibility/source/extended/accessibletablistboxtable.cxx

@@ -65,8 +65,7 @@ namespace accessibility
     {
         if ( isAlive() )
         {
-            VclEventId nEventId = rVclWindowEvent.GetId();
-            switch ( nEventId )
+            switch ( VclEventId nEventId = rVclWindowEvent.GetId(); nEventId )
             {
                 case  VclEventId::ObjectDying :
                 {