Update self nick only if the nick change is successful.
Update self nick only if the nick change is successful.

pol51/QXMPP-CMake,ycsoft/qxmpp,ycsoft/qxmpp,Kaffeine/qxmpp,gamenet/qxmpp_old,gamenet/qxmpp,LightZam/qxmpp,KangLin/qxmpp,Ilyatk/qxmpp,gotomypc/qxmpp,gotomypc/qxmpp,olesalscheider/qxmpp,Ilyatk/qxmpp,KangLin/qxmpp,gamenet/qxmpp_old,cccco/qxmpp,KangLin/qxmpp,olesalscheider/qxmpp,LightZam/qxmpp,gamenet/qxmpp_old,kollix/qxmpp,LightZam/qxmpp,trulabs/qxmpp-old,pol51/QXMPP-CMake,cccco/qxmpp,olesalscheider/qxmpp,deepak899/qxmpp,gamenet/qxmpp,kollix/qxmpp,deepak899/qxmpp,trulabs/qxmpp-old,gamenet/qxmpp,pol51/QXMPP-CMake,trulabs/qxmpp-old,cccco/qxmpp,Kaffeine/qxmpp,kollix/qxmpp,ycsoft/qxmpp,Ilyatk/qxmpp,gotomypc/qxmpp,deepak899/qxmpp,Kaffeine/qxmpp