Add a missing indentation

Thanks, Python3, for still being a Pita.

StatsCrosslet-DS/StatsCrosslet.py

@@ -340,7 +340,7 @@ class StatsCrosslet(Device):
         :return:None
         """
         if is_stop_acquisition_allowed() is True:
-        self.data_acquisition_is_active = False
+            self.data_acquisition_is_active = False
         # PROTECTED REGION END #    //  StatsCrosslet.stop_acquisition
 
     def is_stop_acquisition_allowed(self):