'Undefined ID' not thrown when validating with SimpleNsStreamWriter

[ppalaga]

There is a test validating the same scenario on the reader side in wstxtest.msv.TestW3CSchema.testSimpleNonNsUndefinedId():

woodstox/src/test/java/wstxtest/msv/TestW3CSchema.java

Lines 143 to 151 in b853557

	public void testSimpleNonNsUndefinedId() throws XMLStreamException
	{
	XMLValidationSchema schema = parseW3CSchema(SIMPLE_NON_NS_SCHEMA);
	String XML = "<personnel><person id='a1'>"
	+ "<name><family>F</family><given>G</given>"
	+ "</name><link manager='m3' /></person></personnel>";
	verifyFailure(XML, schema, "undefined referenced id ('m3')",
	"Undefined ID 'm3'");
	}

There the validation exception containg Undefined ID 'm3' is thrown properly.

When the same test is adapted for SimpleNsStreamWriter the exception is not thrown.

A PR with the reproducer follows.

[ppalaga]

The above is with W3CSchema. The same is reproducible with a RelaxNG schema. A reproducer follows.