Fix two bugs in xmlXPathNodeValHash which could lead to errors when
comparing nodesets to strings:
- Only use contents of text nodes to compute the hash for element nodes.
Comments, PIs, and other node types don't affect the string-value and
must be ignored.
- Reset `string` to NULL for node types other than text.
Reported by Aleksei on the mailing list:
https://mail.gnome.org/archives/xml/2017-September/msg00016.html
- xpath.c xpointer.c: XPointer reorder of ranges start/end and
string-range for empty strings
- test/XPath/docs/str test/XPath/xptr/chaptersrange
test/XPath/xptr/strrange: augmented the XPointer testsuite
Daniel
- testXPath.c xpath.[ch]: moved some debug functions to xpath core
- xpointer.c: implemented string-range() at least a good first version
- test/XPath/docs/str test/XPath/xptr/strrange
result/XPath/xptr/strrange: the string-range() tests
Daniel