Start major refactoring to use ctypes everywhere

asn1_value_editor/gui.py

@@ -403,7 +403,7 @@ def gui():
         elif dll:
             # Provide pointer to the shared lib to the backends
             encoder_backend.setSharedLib(dll)
-        editor.backend = encoder_backend
+        editor.setBackend(encoder_backend)
         editor.log = log
         dockWidget = editor.parent()
         myButtons = dockWidget.findChildren(QPushButton)