XPath stack optimization: Reduce stack usage during parsing by sharing scratch buffer for variable/number parsing (we only need one per parser)
XPath stack optimization: Reduce stack usage during parsing by sharing scratch buffer for variable/number parsing (we only need one per parser)

git-svn-id: febc13fe83507aab7d46ca3748413bb6c67ab8eb@928 99668b35-9821-0410-8761-19e4c4f06640

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