Geometry, checker: Minor change.

src/View/CheckList/Worker.py

@@ -79,5 +79,5 @@ class TabWorker(QObject):
                 self._checker_q.put(checker)
                 time.sleep(5)
             else:
-                checker._run(self._study)
+                checker.run(self._study)
                 self.signalStatus.emit("progress")

src/View/Geometry/Window.py

@@ -613,7 +613,7 @@ class GeometryWindow(PamhyrWindow):
             options=options
         )
 
-        if filename != '':
+        if filename != '' and filename is not None:
             self._export_to_file_st(filename)
 
     def _export_to_file_st(self, filename):