remove empty metacontact when we remove a contact.   (really usefull when removing a gateway)
remove empty metacontact when we remove a contact.   (really usefull when removing a gateway)

svn path=/branches/kopete/0.12/kopete/; revision=552564

Jtalk/kopete-fork-xep0136,Jtalk/kopete-fork-xep0136,josh-wambua/kopete,josh-wambua/kopete,Jtalk/kopete-fork-xep0136,josh-wambua/kopete,josh-wambua/kopete,Jtalk/kopete-fork-xep0136,Jtalk/kopete-fork-xep0136,josh-wambua/kopete,Jtalk/kopete-fork-xep0136,josh-wambua/kopete,josh-wambua/kopete