[Tim Holy][msvcrt]Implement _wtmpnam

[Uwe Bonnes]

Appended patch lingers on http://bugs.winehq.org/show_bug.cgi?id=16135

No rejection reson is given in that thread. If there is any, it should be
entered in that thread.
-- 
Uwe Bonnes                bon at elektron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
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