fix crash with ValueHash/ValueList used as default argument (or even at all)

bindings/python/knowCorePython.h

@@ -186,7 +186,7 @@ namespace pybind11::detail
      */
     static handle cast(knowCore::ValueHash src, return_value_policy policy, handle parent )
     {
-      return pybind11::cast(src.hash(), policy, parent);
+      return pybind11::cast(src.hash(), policy, parent).release();
     }
   };
   template <>
@@ -210,7 +210,7 @@ namespace pybind11::detail
      */
     static handle cast(knowCore::ValueList src, return_value_policy policy, handle parent )
     {
-      return pybind11::cast(src.values(), policy, parent);
+      return pybind11::cast(src.values(), policy, parent).release();
     }
   };
   template <>

src/knowCore/ValueHash.cpp

@@ -30,6 +30,10 @@ ValueHash::ValueHash(const ValueHash& _rhs) : d(_rhs.d)
 {
 }
 
+ValueHash::ValueHash(ValueHash&& _rhs) : d(std::move(_rhs.d))
+{
+}
+
 ValueHash ValueHash::operator=(const ValueHash& _rhs)
 {
   d = _rhs.d;

src/knowCore/ValueHash.h

@@ -16,6 +16,7 @@ namespace knowCore
     ValueHash(std::initializer_list<std::pair<QString, Value> >);
     ValueHash(const QHash<QString, Value>& _value);
     ValueHash(const ValueHash& _list);
+    ValueHash(ValueHash&& _list);
     ValueHash operator=(const ValueHash& _list);
     ~ValueHash();
     static ReturnValue<ValueHash> fromVariantMap(const QVariantMap& _map);