This does no more cause a ClassCastExceptions.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@227352 13f79535-47bb-0310-9956-ffa450edef68

test/layoutengine/disabled-testcases.txt

@@ -13,5 +13,4 @@ page-number-citation3.xml
 table-border-collapse1.xml
 table-border-collapse2.xml
 table-column4.xml
-table-fixed2.xml
-letter-spacing3.xml
+table-fixed2.xml