ring-call-channel: fix interface declaration macros
ring-call-channel: fix interface declaration macros

Add semicolon after each G_IMPLEMENT_INTERFACE().

freedesktop-unofficial-mirror/telepathy__telepathy-ring,matthewvogt/telepathy-ring,freedesktop-unofficial-mirror/telepathy__telepathy-ring,jpoutiai/telepathy-ring,matthewvogt/telepathy-ring,maemo-foss/meego-cellular-telepathy-ring,jpoutiai/telepathy-ring,freedesktop-unofficial-mirror/telepathy__telepathy-ring,jpoutiai/telepathy-ring,matthewvogt/telepathy-ring,maemo-foss/meego-cellular-telepathy-ring,maemo-foss/meego-cellular-telepathy-ring