disobedience/disobedience.h: Declare variables as `extern'.

[disorder] / debian / disobedience.menu

?package(disobedience):\
        needs="x11" \
        section="Applications/Sound" \
        title="Disobedience" \
        icon16x16="/usr/share/pixmaps/disobedience16x16.xpm" \
        icon32x32="/usr/share/pixmaps/disobedience32x32.xpm" \
        longtitle="DisOrder client" \
        command="/usr/bin/disobedience"