TpProxy: finish_all_requests: don't leak copied GQueue
TpProxy: finish_all_requests: don't leak copied GQueue

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=76000
Reviewed-by: Guillaume Desmottes

Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib