ResourceItem: Fix move assignment of m_lastSet

resource.cpp

@@ -544,7 +544,7 @@ ResourceItem &ResourceItem::operator=(ResourceItem &&other) noexcept
     m_num = other.m_num;
     m_numPrev = other.m_numPrev;
     m_rid = other.m_rid;
-    m_lastSet = std::move(other.m_lastChanged);
+    m_lastSet = std::move(other.m_lastSet);
     m_lastChanged = std::move(other.m_lastChanged);
     m_rulesInvolved = std::move(other.m_rulesInvolved);
     other.m_rid = &rInvalidItemDescriptor;