Windows: jni-client.c: Disable langinfo.h and its usage
Windows: jni-client.c: Disable langinfo.h and its usage

There is no langinfo.h on Windows.

In any case, checking the locale (and forcing utf-8 if it is not a
utf-8 one) is not needed now, as the LG library is responsible to set it
correctly. So maybe all of this code can be removed.

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