bugfix: added default value for parameter 'addpar', since it was not possible...

bugfix: added default value for parameter 'addpar', since it was not possible to NOT set it in the CONTROL file

python/FlexpartTools.py

@@ -508,6 +508,8 @@ class Control:
             if not hasattr(self,'etadiff'):
                 self.etadiff='0'
 
+            if not hasattr(self,'addpar'):
+                self.addpar=''
             if not isinstance(self.type, list):
                 self.type = [self.type]
             if not isinstance(self.time, list):