conn-olpc: fix 2 references issues: add_activity_info_in_set doesn't return a new ref and we always have to ref the activity when inserting to olpc_current_act
conn-olpc: fix 2 references issues: add_activity_info_in_set doesn't return a new ref and we always have to ref the activity when inserting to olpc_current_act

mlundblad/telepathy-gabble,Ziemin/telepathy-gabble,mlundblad/telepathy-gabble,community-ssu/telepathy-gabble,mlundblad/telepathy-gabble,jku/telepathy-gabble,jku/telepathy-gabble,community-ssu/telepathy-gabble,Ziemin/telepathy-gabble,community-ssu/telepathy-gabble,jku/telepathy-gabble,community-ssu/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble