[dcxml] changed /dcxml to use hashing if enabled. changed /dcxml to properly check the results of FirstChildElement() for a nullptr result.
[dcxml]
changed /dcxml to use hashing if enabled.
changed /dcxml to properly check the results of FirstChildElement() for a nullptr result.

twig/dcxdll,twig/dcxdll,twig/dcxdll,twig/dcxdll,twig/dcxdll