Update perturbIC.py

Author: leoberhelman

src/umfile_utils/perturbIC.py

@@ -206,8 +206,8 @@ def main():
 
     # Skip mule validation if the "--validate" option is provided
     if not args.validate:
-        ff.validate = void_validation
-
+        ff.validate = void_validation()
+        
     # loop through the fields
     for ifield, field in enumerate(ff.fields):
         if is_field_to_perturb(field, STASH_THETA):