CppTools: Minor optimization in CppCompletionAssistant
CppTools: Minor optimization in CppCompletionAssistant

Change-Id: Ieb452713e9e09fce107520c4fd2a401007802e89
Reviewed-by: Przemyslaw Gorszkowski <658869a15cf6355f958e4f80a0cdcda385bdf3a7@gmail.com>
Reviewed-by: Nikolai Kosjar <9571db158ca61a0d070db010803474231fa0cbab@digia.com>

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