Changed fp specials handling in XPath (using fpclassify/fpclass where possible, NaN generation is based on float QNaN, removed magic double constants/byte arrays)
Changed fp specials handling in XPath (using fpclassify/fpclass where possible, NaN generation is based on float QNaN, removed magic double constants/byte arrays)

git-svn-id: febc13fe83507aab7d46ca3748413bb6c67ab8eb@479 99668b35-9821-0410-8761-19e4c4f06640

zeux/pugixml,zeux/pugixml,zeux/pugixml,zeux/pugixml