QmlJS checks: Improve warning about accidental empty blocks.
QmlJS checks: Improve warning about accidental empty blocks.

Change-Id: I2bddd65aef9092bf87f5a441e065ebca0e772174
Reviewed-on: http://codereview.qt-project.org/4331
Reviewed-by: Fawzi Mohamed <7388270c57edd0fabd71d8eb0322d66e3c40e57e@nokia.com>

amyvmiwei/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,xianian/qt-creator,Distrotech/qtcreator,azat/qtcreator,azat/qtcreator,colede/qtcreator,omniacreator/qtcreator,azat/qtcreator,darksylinc/qt-creator,Distrotech/qtcreator,martyone/sailfish-qtcreator,azat/qtcreator,bakaiadam/collaborative_qt_creator,kuba1/qtcreator,kuba1/qtcreator,hdweiss/qt-creator-visualizer,amyvmiwei/qt-creator,danimo/qt-creator,malikcjm/qtcreator,malikcjm/qtcreator,danimo/qt-creator,KDE/android-qt-creator,syntheticpp/qt-creator,KDAB/KDAB-Creator,Distrotech/qtcreator,xianian/qt-creator,ostash/qt-creator-i18n-uk,richardmg/qtcreator,amyvmiwei/qt-creator,syntheticpp/qt-creator,maui-packages/qt-creator,xianian/qt-creator,kuba1/qtcreator,AltarBeastiful/qt-creator,hdweiss/qt-creator-visualizer,amyvmiwei/qt-creator,hdweiss/qt-creator-visualizer,duythanhphan/qt-creator,martyone/sailfish-qtcreator,KDE/android-qt-creator,farseerri/git_code,ostash/qt-creator-i18n-uk,bakaiadam/collaborative_qt_creator,malikcjm/qtcreator,jonnor/qt-creator,bakaiadam/collaborative_qt_creator,Distrotech/qtcreator,duythanhphan/qt-creator,bakaiadam/collaborative_qt_creator,bakaiadam/collaborative_qt_creator,danimo/qt-creator,azat/qtcreator,farseerri/git_code,darksylinc/qt-creator,danimo/qt-creator,darksylinc/qt-creator,Distrotech/qtcreator,xianian/qt-creator,richardmg/qtcreator,darksylinc/qt-creator,jonnor/qt-creator,Distrotech/qtcreator,colede/qtcreator,KDAB/KDAB-Creator,martyone/sailfish-qtcreator,maui-packages/qt-creator,bakaiadam/collaborative_qt_creator,martyone/sailfish-qtcreator,xianian/qt-creator,colede/qtcreator,richardmg/qtcreator,syntheticpp/qt-creator,xianian/qt-creator,farseerri/git_code,amyvmiwei/qt-creator,maui-packages/qt-creator,duythanhphan/qt-creator,ostash/qt-creator-i18n-uk,colede/qtcreator,malikcjm/qtcreator,farseerri/git_code,omniacreator/qtcreator,ostash/qt-creator-i18n-uk,farseerri/git_code,xianian/qt-creator,colede/qtcreator,AltarBeastiful/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,amyvmiwei/qt-creator,omniacreator/qtcreator,maui-packages/qt-creator,darksylinc/qt-creator,ostash/qt-creator-i18n-uk,hdweiss/qt-creator-visualizer,KDAB/KDAB-Creator,KDAB/KDAB-Creator,omniacreator/qtcreator,farseerri/git_code,kuba1/qtcreator,ostash/qt-creator-i18n-uk,KDE/android-qt-creator,jonnor/qt-creator,jonnor/qt-creator,amyvmiwei/qt-creator,darksylinc/qt-creator,AltarBeastiful/qt-creator,maui-packages/qt-creator,AltarBeastiful/qt-creator,darksylinc/qt-creator,KDE/android-qt-creator,omniacreator/qtcreator,malikcjm/qtcreator,syntheticpp/qt-creator,KDE/android-qt-creator,colede/qtcreator,danimo/qt-creator,colede/qtcreator,KDE/android-qt-creator,hdweiss/qt-creator-visualizer,martyone/sailfish-qtcreator,duythanhphan/qt-creator,danimo/qt-creator,malikcjm/qtcreator,AltarBeastiful/qt-creator,duythanhphan/qt-creator,kuba1/qtcreator,kuba1/qtcreator,farseerri/git_code,bakaiadam/collaborative_qt_creator,KDAB/KDAB-Creator,danimo/qt-creator,syntheticpp/qt-creator,Distrotech/qtcreator,danimo/qt-creator,darksylinc/qt-creator,jonnor/qt-creator,syntheticpp/qt-creator,maui-packages/qt-creator,martyone/sailfish-qtcreator,malikcjm/qtcreator,AltarBeastiful/qt-creator,jonnor/qt-creator,KDE/android-qt-creator,farseerri/git_code,richardmg/qtcreator,KDE/android-qt-creator,martyone/sailfish-qtcreator,richardmg/qtcreator,danimo/qt-creator,AltarBeastiful/qt-creator,kuba1/qtcreator,syntheticpp/qt-creator,richardmg/qtcreator,azat/qtcreator,omniacreator/qtcreator,duythanhphan/qt-creator,ostash/qt-creator-i18n-uk,AltarBeastiful/qt-creator,amyvmiwei/qt-creator,duythanhphan/qt-creator,richardmg/qtcreator,omniacreator/qtcreator,kuba1/qtcreator,kuba1/qtcreator,maui-packages/qt-creator,KDAB/KDAB-Creator,hdweiss/qt-creator-visualizer