Fixed crash in lookup context due to null-name
Fixed crash in lookup context due to null-name

Return early in this case.

Reviewed-by: Roberto Raggi

maui-packages/qt-creator,maui-packages/qt-creator,amyvmiwei/qt-creator,amyvmiwei/qt-creator,KDE/android-qt-creator,omniacreator/qtcreator,KDE/android-qt-creator,colede/qtcreator,omniacreator/qtcreator,amyvmiwei/qt-creator,colede/qtcreator,KDE/android-qt-creator,omniacreator/qtcreator,xianian/qt-creator,colede/qtcreator,maui-packages/qt-creator,KDE/android-qt-creator,syntheticpp/qt-creator,hdweiss/qt-creator-visualizer,jonnor/qt-creator,danimo/qt-creator,KDAB/KDAB-Creator,duythanhphan/qt-creator,kuba1/qtcreator,omniacreator/qtcreator,KDE/android-qt-creator,colede/qtcreator,yinyunqiao/qtcreator,duythanhphan/qt-creator,syntheticpp/qt-creator,darksylinc/qt-creator,xianian/qt-creator,kuba1/qtcreator,renatofilho/QtCreator,bakaiadam/collaborative_qt_creator,sandsmark/qtcreator-minimap,KDAB/KDAB-Creator,yinyunqiao/qtcreator,enricoros/k-qt-creator-inspector,KDAB/KDAB-Creator,darksylinc/qt-creator,malikcjm/qtcreator,dmik/qt-creator-os2,AltarBeastiful/qt-creator,maui-packages/qt-creator,ostash/qt-creator-i18n-uk,renatofilho/QtCreator,yinyunqiao/qtcreator,martyone/sailfish-qtcreator,azat/qtcreator,enricoros/k-qt-creator-inspector,enricoros/k-qt-creator-inspector,dmik/qt-creator-os2,Distrotech/qtcreator,xianian/qt-creator,sandsmark/qtcreator-minimap,maui-packages/qt-creator,xianian/qt-creator,Distrotech/qtcreator,danimo/qt-creator,azat/qtcreator,xianian/qt-creator,richardmg/qtcreator,pcacjr/qt-creator,malikcjm/qtcreator,kuba1/qtcreator,amyvmiwei/qt-creator,azat/qtcreator,martyone/sailfish-qtcreator,KDE/android-qt-creator,hdweiss/qt-creator-visualizer,martyone/sailfish-qtcreator,bakaiadam/collaborative_qt_creator,ostash/qt-creator-i18n-uk,darksylinc/qt-creator,kuba1/qtcreator,richardmg/qtcreator,kuba1/qtcreator,hdweiss/qt-creator-visualizer,enricoros/k-qt-creator-inspector,KDAB/KDAB-Creator,farseerri/git_code,Distrotech/qtcreator,farseerri/git_code,richardmg/qtcreator,xianian/qt-creator,ostash/qt-creator-i18n-uk,dmik/qt-creator-os2,kuba1/qtcreator,syntheticpp/qt-creator,yinyunqiao/qtcreator,richardmg/qtcreator,malikcjm/qtcreator,hdweiss/qt-creator-visualizer,ostash/qt-creator-i18n-uk,danimo/qt-creator,darksylinc/qt-creator,kuba1/qtcreator,jonnor/qt-creator,duythanhphan/qt-creator,danimo/qt-creator,farseerri/git_code,dmik/qt-creator-os2,renatofilho/QtCreator,renatofilho/QtCreator,KDE/android-qt-creator,sandsmark/qtcreator-minimap,farseerri/git_code,malikcjm/qtcreator,jonnor/qt-creator,Distrotech/qtcreator,bakaiadam/collaborative_qt_creator,duythanhphan/qt-creator,pcacjr/qt-creator,amyvmiwei/qt-creator,sandsmark/qtcreator-minimap,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,AltarBeastiful/qt-creator,dmik/qt-creator-os2,hdweiss/qt-creator-visualizer,xianian/qt-creator,xianian/qt-creator,pcacjr/qt-creator,kuba1/qtcreator,danimo/qt-creator,martyone/sailfish-qtcreator,pcacjr/qt-creator,sandsmark/qtcreator-minimap,bakaiadam/collaborative_qt_creator,duythanhphan/qt-creator,ostash/qt-creator-i18n-uk,KDAB/KDAB-Creator,farseerri/git_code,danimo/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,bakaiadam/collaborative_qt_creator,enricoros/k-qt-creator-inspector,AltarBeastiful/qt-creator,Distrotech/qtcreator,malikcjm/qtcreator,jonnor/qt-creator,AltarBeastiful/qt-creator,malikcjm/qtcreator,jonnor/qt-creator,AltarBeastiful/qt-creator,richardmg/qtcreator,enricoros/k-qt-creator-inspector,omniacreator/qtcreator,Distrotech/qtcreator,colede/qtcreator,syntheticpp/qt-creator,bakaiadam/collaborative_qt_creator,syntheticpp/qt-creator,azat/qtcreator,malikcjm/qtcreator,AltarBeastiful/qt-creator,xianian/qt-creator,renatofilho/QtCreator,azat/qtcreator,amyvmiwei/qt-creator,AltarBeastiful/qt-creator,amyvmiwei/qt-creator,omniacreator/qtcreator,ostash/qt-creator-i18n-uk,hdweiss/qt-creator-visualizer,KDAB/KDAB-Creator,danimo/qt-creator,farseerri/git_code,colede/qtcreator,darksylinc/qt-creator,farseerri/git_code,danimo/qt-creator,azat/qtcreator,dmik/qt-creator-os2,jonnor/qt-creator,duythanhphan/qt-creator,colede/qtcreator,sandsmark/qtcreator-minimap,maui-packages/qt-creator,dmik/qt-creator-os2,yinyunqiao/qtcreator,AltarBeastiful/qt-creator,darksylinc/qt-creator,kuba1/qtcreator,bakaiadam/collaborative_qt_creator,enricoros/k-qt-creator-inspector,maui-packages/qt-creator,pcacjr/qt-creator,amyvmiwei/qt-creator,syntheticpp/qt-creator,ostash/qt-creator-i18n-uk,yinyunqiao/qtcreator,renatofilho/QtCreator,pcacjr/qt-creator,farseerri/git_code,duythanhphan/qt-creator,pcacjr/qt-creator,darksylinc/qt-creator,yinyunqiao/qtcreator,richardmg/qtcreator,darksylinc/qt-creator,KDE/android-qt-creator,martyone/sailfish-qtcreator,omniacreator/qtcreator,Distrotech/qtcreator,richardmg/qtcreator,syntheticpp/qt-creator,danimo/qt-creator