Fixes:    - crash while open invalid doc files
Fixes:    - crash while open invalid doc files

Task:     - found by Denis
RevBy:    - Thomas
AutoTest: - manual
Details:  - we have some broken doc entrys, they won't return a url at all

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