msxml3: Correct createElement return value for an invalid type

[Alistair Leslie-Hughes]

Hi,
	Fixes regressions
xmldoc.c:273: Test failed: Expected S_OK, got -2147467263
xmldoc.c:274: Test failed: Expected non-NULL element


Changelog:
	msxml3: Correct createElement return value for an invalid type

Best Regards
  Alistair Leslie-Hughes
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