[oemid] Reduce warnings about vtable by adding virtual destructor

src/modules/oemid/OEMViewStep.cpp

@@ -43,9 +43,15 @@ public:
         )
     }
 
+    virtual ~OEMPage() override;
+    
     Ui_OEMPage* m_ui;
 } ;
 
+OEMPage::~OEMPage()
+{
+}
+
 
 OEMViewStep::OEMViewStep(QObject* parent)
     : Calamares::ViewStep( parent )