Fix decimal option in metrics command

bob/measure/script/common_options.py

@@ -608,8 +608,8 @@ def metrics_command(docstring, criteria=('eer', 'min-hter', 'far'),
         @open_file_mode_option()
         @verbosity_option()
         @click.pass_context
-        @functools.wraps(func)
         @decimal_option()
+        @functools.wraps(func)
         def wrapper(*args, **kwds):
             return func(*args, **kwds)
         return wrapper