found the last bug raised by NIST tests in comparing base64 strings,

* xmlschemastypes.c: found the last bug raised by NIST tests in
  comparing base64 strings, result from runsuite:
  ## NIST test suite for Schemas version NIST2004-01-14
  Ran 23170 tests (3953 schemata), no errors
Daniel
2 files changed