fix silly bug

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene4547@1430122 13f79535-47bb-0310-9956-ffa450edef68

lucene/core/src/java/org/apache/lucene/codecs/lucene41/Lucene41SimpleDocValuesFormat.java

@@ -374,12 +374,12 @@ public class Lucene41SimpleDocValuesFormat extends SimpleDocValuesFormat {
 
         @Override
         public int getValueCount() {
-          return ordinals.size();
+          return binary.size();
         }
 
         @Override
         public int size() {
-          return binary.size();
+          return ordinals.size();
         }
       };
     }