FOP-1760: Findbugs

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/Temp_ChangeBars2@1835133 13f79535-47bb-0310-9956-ffa450edef68

fop-core/src/main/java/org/apache/fop/area/inline/InlineBlock.java

@@ -27,6 +27,7 @@ import org.apache.fop.area.Block;
  */
 public class InlineBlock extends InlineParent {
 
+    private static final long serialVersionUID = -3725062353292109517L;
     private final Block block;
 
     public InlineBlock(Block block) {

fop-core/src/main/java/org/apache/fop/layoutmgr/inline/LeaderLayoutManager.java

@@ -218,6 +218,7 @@ public class LeaderLayoutManager extends LeafNodeLayoutManager {
             }
         }
 
+        assert leaderArea != null;
         leaderArea.setChangeBarList(getChangeBarList());
 
         TraitSetter.setProducerID(leaderArea, fobj.getId());