7000973: isBogus needs to be called on the to-be-returned entry, not on the current entry

Reviewed-by: jjg
Contributed-by: jan.lahoda@oracle.com

src/share/classes/com/sun/tools/javac/code/Scope.java

@@ -528,7 +528,7 @@ public class Scope {
             }
             public Entry next() {
                 Entry e = super.shadowed;
-                while (isBogus())
+                while (e.isBogus())
                     e = e.shadowed;
                 return e;
             }