cppcoreguidelines-pro-type-union-access

According to https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md using union for type-punning is undefined behaviour.
 Replace it with std::memcpy

src/Mod/Path/App/CommandPyImp.cpp

@@ -231,8 +231,7 @@ Py::Object CommandPy::getPlacement(void) const
 
 void CommandPy::setPlacement(Py::Object arg)
 {
-    union PyType_Object pyType = {&(Base::PlacementPy::Type)};
-    Py::Type PlacementType(pyType.o);
+    Py::Type PlacementType(Base::getTypeAsObject(&(Base::PlacementPy::Type)));
     if(arg.isType(PlacementType)) {
         getCommandPtr()->setFromPlacement( *static_cast<Base::PlacementPy*>((*arg))->getPlacementPtr() );
         parameters_copy_dict.clear();