Fix obscure crash in Find when no FindFilter exist.
Fix obscure crash in Find when no FindFilter exist.

Can only happpen if the user disables all plugins...

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