TextEditor: Guard one use of BaseTextEditorPrivate::m_editor
TextEditor: Guard one use of BaseTextEditorPrivate::m_editor

Change-Id: I69f1400419d6764201a0bbce2e4e2da51beb247f
Reviewed-by: hjk <f81b91af79013637d070c18d38a75b90eaae8ba3@nokiamail.com>

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