ensured BAD-flaggedd-drop for harmonization

saqc/funcs/harm_functions.py

@@ -69,6 +69,9 @@ def harmWrapper(heap={}):
         data, flagger = flagMissing(
             data, field, flagger, nodata=data_missing_value, **kwargs
         )
+        # and dropped for harmonization:
+        if drop_flags is not None:
+            drop_flags.append(flagger.BAD)
 
         # before sending the current flags and data frame to the future (for backtracking reasons), we clear it
         # from merge-nans that just resulted from harmonization of other variables!