xmlfix3: unoxml: CNode fixes:  add some additional argument checks.  fix mess in CNode::setPrefix().
xmlfix3: unoxml: CNode fixes:
 add some additional argument checks.
 fix mess in CNode::setPrefix().
JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core