fix warning in QtSvg if qreal == float
fix warning in QtSvg if qreal == float

Reviewed-by: mauricek
(cherry picked from commit 305ce9ea67c11826d91c032ead55edfd5e15462f)

igor-sfdc/qt-wk,KDE/qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,KDE/qt,radekp/qt,radekp/qt,igor-sfdc/qt-wk,radekp/qt,igor-sfdc/qt-wk,pruiz/wkhtmltopdf-qt,KDE/qt,radekp/qt,RLovelett/qt,igor-sfdc/qt-wk,igor-sfdc/qt-wk,radekp/qt,KDE/qt,radekp/qt,KDE/qt,RLovelett/qt,RLovelett/qt,igor-sfdc/qt-wk,radekp/qt,radekp/qt,RLovelett/qt,RLovelett/qt,igor-sfdc/qt-wk,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,KDE/qt,RLovelett/qt,KDE/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,RLovelett/qt,igor-sfdc/qt-wk,radekp/qt,KDE/qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,pruiz/wkhtmltopdf-qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,RLovelett/qt,igor-sfdc/qt-wk,radekp/qt