libxml2: Necessary changes before fixing CVE-2016-5131
xpath:
- Check for errors after evaluating first operand.
- Add sanity check for empty stack.
- Include comparation in changes from xmlXPathCmpNodesExt to xmlXPathCmpNodes
(From OE-Core rev:
96ef568f75dded56a2123b63dcc8b443f796afe0)
Signed-off-by: Andrej Valek <andrej.valek@siemens.com>
Signed-off-by: Pascal Bach <pascal.bach@siemens.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
