Fix compiler warnings.

src/libs/vdxf/vdxfengine.h

@@ -67,6 +67,10 @@ class VDxfEngine final : public QPaintEngine
     friend class VDxfPaintDevice;
 
 public:
+    using QPaintEngine::drawEllipse;
+    using QPaintEngine::drawLines;
+    using QPaintEngine::drawPolygon;
+
     VDxfEngine();
     ~VDxfEngine() override;
 

src/libs/vobj/vobjengine.h

@@ -45,6 +45,9 @@ class QTextStream;
 class VObjEngine final : public QPaintEngine
 {
 public:
+    using QPaintEngine::drawPoints;
+    using QPaintEngine::drawPolygon;
+
     VObjEngine();
     ~VObjEngine() override = default;