XLIFF empty "target" elements are interpreted as missing

[Former user]

Original [issue 219](https://code.google.com/p/okapi/issues/detail?id=219) created by mihn... on 2012-04-17T18:04:27.000Z:

Steps will reproduce the problem: 1. Create an XLIFFFilter 2. Start reading an XLIFF file that has an empty target 3. Check the TEXT\_UNIT events 4. tu.getTarget(trgLocale) returns null

Steps will reproduce the problem without coding: 1. Have an xlf that contains a translation-unit with empty source and empty target 2. Validate in checkmate 3. "Missing translation." error

I would expect an empty "target" in file to result in an empty target in the event, not a null one.

Using m16 on Windows.

Attached test file and fix.

[Former user]

Comment [1.](https://code.google.com/p/okapi/issues/detail?id=219#c1) originally posted by @ysavourel on 2012-04-18T10:50:09.000Z:

Patch applied, and extra unit tests added. Thank you Mihai.