Let user know we are aborting the adding of themselves, rather than silently failing.
Let user know we are aborting the adding of themselves, rather than silently failing.

svn path=/trunk/kdenetwork/kopete/; revision=380601

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