vulkan fix

Author: rectalogic

com/rectalogic/RenderWindow/render_window.h

@@ -42,7 +42,7 @@ class RenderWindow : public QQuickWindow, public QQmlParserStatus {
 
     RenderWindow(RenderControl* renderControl);
 
-#ifdef MEDIAFX_ENABLE_VULKAN
+#ifdef RENDERWINDOW_ENABLE_VULKAN
     QVulkanInstance m_vulkanInstance;
 #endif
     std::unique_ptr<RenderControl> m_renderControl;