[m.i788a] Follow-up to #788 ()

Merging branch 'm.i788a'  into 'main'.

See merge request !2105

GUI/Model/Descriptor/SelectionProperty.h

@@ -162,10 +162,11 @@ public:
         const uint typeIndex = XML::readUIntAttribute(r, XML::Attrib::type);
         const auto type = static_cast<typename Catalog::Type>(typeIndex);
         auto* p = Catalog::create(type, argsForCreation...);
-        if (m_initializer)
-            m_initializer(p, m_p.get());
-        if (p)
+        if (p) {
+            if (m_initializer)
+                m_initializer(p, m_p.get());
             p->readFrom(r);
+        }
         m_p.reset(p);
     }