MSVC: Fix compiler warnings

src/Gui/NavigationStyle.cpp

@@ -62,7 +62,7 @@ public:
         FreeTurntable
     };
 
-    static constexpr float defaultSphereRadius = 0.8;
+    static constexpr float defaultSphereRadius = 0.8F;
 
     FCSphereSheetProjector(const SbSphere & sph, const SbBool orienttoeye = true)
         : SbSphereSheetProjector(sph, orienttoeye)

src/Mod/PartDesign/App/FeatureExtrude.cpp

@@ -691,7 +691,7 @@ App::DocumentObjectExecReturn* FeatureExtrude::buildExtrusion(ExtrudeOptions opt
                                             TopoShape::PrismMode::None,
                                             true /*CheckUpToFaceLimits.getValue()*/);
             }
-            catch (Base::Exception& e) {
+            catch (Base::Exception&) {
                 if (method == "UpToShape" && faceCount > 1){
                     return new App::DocumentObjectExecReturn(QT_TRANSLATE_NOOP(
                         "Exception",

src/Mod/Sketcher/App/SketchObject.cpp

@@ -265,7 +265,7 @@ App::DocumentObjectExecReturn* SketchObject::execute()
         rebuildExternalGeometry();
         Constraints.acceptGeometry(getCompleteGeometry());
     }
-    catch (const Base::Exception& e) {
+    catch (const Base::Exception&) {
         // 9/16/24: We used to clear the constraints here, but we no longer want to do that
         // as missing reference geometry is not considered an error while we sort out sketcher UI.
         // Base::Console().Error("%s\nClear constraints to external geometry\n", e.what());