By default, only the first child of a multi-switch should be laid out
Patch by Seifeddine Dridi, applied with minor modifications


git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/Temp_WhitespaceManagement@1588548 13f79535-47bb-0310-9956-ffa450edef68