Description:
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when I use xmlwriter_write_attribute, it puts attribute value escaped with html entities. When I use the same data to put element value, it shows correctly. I use utf8 with lithuanian symbols. 

Reproduce code:
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xmlwriter_start_element($handler, $key);
xmlwriter_write_attribute($handler, $key, $value);
xmlwriter_text($handler, $value);
xmlwriter_end_element($handler);


Expected result:
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<agent name="Ieva Vy&#269;ait&#279;">Ieva Vy&#269;ait&#279;</agent>
	<agent name="J&#363;rat&#279; Baurien&#279;">J&#363;rat&#279; Baurien&#279;</agent>
	<agent name="Tomas Savickas">Tomas Savickas</agent>
	<agent name="Ieva Grauslyt&#279;">Ieva Grauslyt&#279;</agent>

Actual result:
--------------
<agent name="Ieva Vy&#x10D;ait&#x117;">Ieva Vy&#269;ait&#279;</agent>
	<agent name="J&#x16B;rat&#x117; Baurien&#x117;">J&#363;rat&#279; Baurien&#279;</agent>
	<agent name="Tomas Savickas">Tomas Savickas</agent>
	<agent name="Ieva Grauslyt&#x117;">Ieva Grauslyt&#279;</agent>