macOS: [skip ci] suppress some more Py3.8 warnings, suppress warnings about deprecated OpenGL API

src/App/FeaturePythonPyImp.h

@@ -27,6 +27,11 @@
 #include <Base/Interpreter.h>
 #include <App/PropertyContainerPy.h>
 
+#if defined(__clang__)
+# pragma clang diagnostic push
+# pragma clang diagnostic ignored "-Wmissing-field-initializers"
+#endif
+
 #define PYTHON_TYPE_DEF(_class_, _subclass_) \
     class _class_ : public _subclass_ \
     { \
@@ -137,4 +142,8 @@ private:
 
 #include "FeaturePythonPyImp.inl"
 
+#if defined(__clang__)
+# pragma clang diagnostic pop
+#endif
+
 #endif // APP_FEATUREPYTHONPYIMP_H