Coverity fixes

CID 156629  - obsolete
CID 156624  - obsolete
CID 163225  - won't fix
CID 163226
CID 163227
CID 163228
CID 163229
CID 163235

src/Mod/TechDraw/Gui/QGIHighlight.cpp

@@ -41,6 +41,7 @@ using namespace TechDrawGui;
 
 QGIHighlight::QGIHighlight()
 {
+    m_refSize = 0.0;
     m_circle = new QGraphicsEllipseItem();
     addToGroup(m_circle);
     m_rect = new QGCustomRect();