Mod: [skip ci] fix some MSVC warnings

src/Mod/Mesh/Gui/ThumbnailExtension.cpp

@@ -56,7 +56,7 @@ Mesh::Extension3MF::Resource ThumbnailExtension3MF::addMesh(const Mesh::MeshObje
 
     ViewProviderMeshBuilder().createMesh(mesh.getKernel(), coord, faces);
 
-    SbRotation rot(-0.353553, -0.146447, -0.353553, -0.853553);
+    SbRotation rot(-0.35355f, -0.14644f, -0.35355f, -0.85355f);
     cam->orientation.setValue(rot);
     SbViewportRegion vpr(256, 256);
     cam->viewAll(root, vpr);

src/Mod/Surface/App/Blending/BlendPointPyImp.cpp

@@ -132,7 +132,7 @@ PyObject *BlendPointPy::setSize(PyObject *args)
         getBlendPointPtr()->setSize(size);
         Py_Return;
     }
-    catch (Standard_Failure &e) {
+    catch (Standard_Failure &) {
         PyErr_SetString(Base::PyExc_FC_CADKernelError, "Failed to set size");
         return nullptr;
     }

src/Mod/TechDraw/App/GeometryObject.cpp

@@ -252,7 +252,7 @@ void GeometryObject::projectShape(const TopoDS_Shape& inShape,
             hidIso = invertGeometry(hidIso);
         }
     }
-    catch (const Standard_Failure& e) {
+    catch (const Standard_Failure&) {
         throw Base::RuntimeError("GeometryObject::projectShape - OCC error occurred while extracting edges");
     }
     catch (...) {