CppTools: Remove QTC_ASSERT in CppModelManager::editorDocument()
CppTools: Remove QTC_ASSERT in CppModelManager::editorDocument()

This fixes

    SOFT ASSERT: "!filePath.isEmpty()" in file
    /home/nik/dev/creator/creator-ut/src/plugins/cpptools/cppmodelmanager.cpp,
    line 467

which can be triggered by e.g. a "git show" document
(onCurrentEditorChanged does not check for an empty file path).

Change-Id: If4ed8e552069b290cb4ac93da52427b7ed2b91e8
Reviewed-by: Eike Ziller <c142da16c73a95a82d35191bcc55b22835617128@theqtcompany.com>

kuba1/qtcreator,Distrotech/qtcreator,amyvmiwei/qt-creator,xianian/qt-creator,AltarBeastiful/qt-creator,martyone/sailfish-qtcreator,danimo/qt-creator,kuba1/qtcreator,martyone/sailfish-qtcreator,amyvmiwei/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,farseerri/git_code,kuba1/qtcreator,danimo/qt-creator,martyone/sailfish-qtcreator,Distrotech/qtcreator,farseerri/git_code,kuba1/qtcreator,Distrotech/qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,danimo/qt-creator,Distrotech/qtcreator,xianian/qt-creator,amyvmiwei/qt-creator,xianian/qt-creator,kuba1/qtcreator,xianian/qt-creator,farseerri/git_code,martyone/sailfish-qtcreator,danimo/qt-creator,kuba1/qtcreator,amyvmiwei/qt-creator,AltarBeastiful/qt-creator,kuba1/qtcreator,amyvmiwei/qt-creator,Distrotech/qtcreator,danimo/qt-creator,amyvmiwei/qt-creator,amyvmiwei/qt-creator,xianian/qt-creator,AltarBeastiful/qt-creator,martyone/sailfish-qtcreator,Distrotech/qtcreator,kuba1/qtcreator,AltarBeastiful/qt-creator,farseerri/git_code,Distrotech/qtcreator,farseerri/git_code,danimo/qt-creator,farseerri/git_code,amyvmiwei/qt-creator,AltarBeastiful/qt-creator,farseerri/git_code,xianian/qt-creator,AltarBeastiful/qt-creator,AltarBeastiful/qt-creator,xianian/qt-creator,martyone/sailfish-qtcreator,danimo/qt-creator,danimo/qt-creator,xianian/qt-creator,farseerri/git_code,AltarBeastiful/qt-creator,kuba1/qtcreator,danimo/qt-creator