+ fix various warnings with VC12

src/Mod/PartDesign/Gui/ViewProviderAddSub.cpp

@@ -88,7 +88,7 @@ void ViewProviderAddSub::attach(App::DocumentObject* obj) {
     else
         material->diffuseColor = SbColor(1,0,0);
     
-    material->transparency = 0.7;    
+    material->transparency = 0.7f;
     auto* pick = new SoPickStyle();
     pick->style = SoPickStyle::UNPICKABLE;
     

src/Mod/PartDesign/Gui/ViewProviderDatumCS.cpp

@@ -129,7 +129,7 @@ void ViewProviderDatumCoordinateSystem::attach ( App::DocumentObject *obj ) {
 
     getShapeRoot ()->addChild(axisLabelYToZTrans);
     SoRotation *rot = new SoRotation();
-    rot->rotation = SbRotation(SbVec3f(1,1,1), 2*M_PI/3);
+    rot->rotation = SbRotation(SbVec3f(1,1,1), static_cast<float>(2*M_PI/3));
     getShapeRoot ()->addChild(rot);
     t = new SoAsciiText();
     t->string = "Z";