Qt4 and Windows binaries crash if there's a non-ASCII character in a file path/config path

omwlauncher.exe and opencs.exe crashes on startup. Windows locale is japanese, although I use russian version of the game. If I open the launcher using applocale and choose russian or english, it launches (although with wrong text encoding).

APPCRASH omwlauncher.exe 0.0.0.0 53c45f44 MSVCR100.dll 10.0.40219.1 4d5f0c22 40000015 0008d6fd 6.1.7600.2.0.0.256.1 1041 48a7 48a702407a02515ff2ff86f9a851fdca d4fe d4fe4b05679f937e39a0bee11fa24f73

(RM-1662 from redmine: created on 2014-07-18 by nekomata ww, , relates #668 (closed))

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