skins2: fix wrong FromLocale()
skins2: fix wrong FromLocale()

file is already utf8 encoded, since it is a string that comes from
the theme.xml description file, and therefore it is expected to be utf8.

(cherry picked from commit ab806efc95b8378fab3b8b7aed78da07957269a1)
Signed-off-by: Erwan Tulou <e27b355b6a481153648f03262de342e9eb9e2807@videolan.org>

jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2