zeroconf/dnssd_clientstub: avoid possible null dereferencing
zeroconf/dnssd_clientstub: avoid possible null dereferencing

Moved check for NULL-pointer earlier

Change-Id: I764bd3c6c0545e7fa0784327375cdf7d06b29a31
Reviewed-by: Fawzi Mohamed <7388270c57edd0fabd71d8eb0322d66e3c40e57e@digia.com>

martyone/sailfish-qtcreator,danimo/qt-creator,amyvmiwei/qt-creator,xianian/qt-creator,amyvmiwei/qt-creator,maui-packages/qt-creator,amyvmiwei/qt-creator,danimo/qt-creator,richardmg/qtcreator,duythanhphan/qt-creator,xianian/qt-creator,martyone/sailfish-qtcreator,richardmg/qtcreator,darksylinc/qt-creator,amyvmiwei/qt-creator,danimo/qt-creator,duythanhphan/qt-creator,kuba1/qtcreator,farseerri/git_code,martyone/sailfish-qtcreator,xianian/qt-creator,maui-packages/qt-creator,colede/qtcreator,kuba1/qtcreator,farseerri/git_code,amyvmiwei/qt-creator,omniacreator/qtcreator,maui-packages/qt-creator,kuba1/qtcreator,farseerri/git_code,AltarBeastiful/qt-creator,darksylinc/qt-creator,Distrotech/qtcreator,duythanhphan/qt-creator,malikcjm/qtcreator,farseerri/git_code,martyone/sailfish-qtcreator,xianian/qt-creator,darksylinc/qt-creator,AltarBeastiful/qt-creator,martyone/sailfish-qtcreator,AltarBeastiful/qt-creator,Distrotech/qtcreator,darksylinc/qt-creator,farseerri/git_code,maui-packages/qt-creator,AltarBeastiful/qt-creator,omniacreator/qtcreator,malikcjm/qtcreator,kuba1/qtcreator,farseerri/git_code,amyvmiwei/qt-creator,duythanhphan/qt-creator,omniacreator/qtcreator,duythanhphan/qt-creator,danimo/qt-creator,AltarBeastiful/qt-creator,richardmg/qtcreator,malikcjm/qtcreator,danimo/qt-creator,danimo/qt-creator,richardmg/qtcreator,omniacreator/qtcreator,omniacreator/qtcreator,kuba1/qtcreator,richardmg/qtcreator,Distrotech/qtcreator,martyone/sailfish-qtcreator,duythanhphan/qt-creator,richardmg/qtcreator,duythanhphan/qt-creator,colede/qtcreator,darksylinc/qt-creator,colede/qtcreator,xianian/qt-creator,darksylinc/qt-creator,xianian/qt-creator,colede/qtcreator,xianian/qt-creator,AltarBeastiful/qt-creator,danimo/qt-creator,kuba1/qtcreator,martyone/sailfish-qtcreator,maui-packages/qt-creator,malikcjm/qtcreator,malikcjm/qtcreator,colede/qtcreator,Distrotech/qtcreator,malikcjm/qtcreator,Distrotech/qtcreator,omniacreator/qtcreator,danimo/qt-creator,omniacreator/qtcreator,farseerri/git_code,colede/qtcreator,amyvmiwei/qt-creator,AltarBeastiful/qt-creator,darksylinc/qt-creator,maui-packages/qt-creator,kuba1/qtcreator,darksylinc/qt-creator,Distrotech/qtcreator,farseerri/git_code,xianian/qt-creator,colede/qtcreator,maui-packages/qt-creator,malikcjm/qtcreator,Distrotech/qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,kuba1/qtcreator,richardmg/qtcreator,AltarBeastiful/qt-creator,kuba1/qtcreator,danimo/qt-creator,amyvmiwei/qt-creator