enum type shows 1st enum value instead of REQUIRED

[timotheecour]

type Foo = enum
  bar1,
  bar2,

type Age = int

proc main(foo: Foo, age: Age)=
  echo (foo, age)

import cligen
dispatch(main)

Usage:
  main [required&optional-params]
  Options(opt-arg sep :|=|spc):
  -h, --help                   write this help to stdout
  -f=, --foo=  enum  bar1      set foo
  -a=, --age=  int   REQUIRED  set age

i would expect -f=, --foo= enum REQUIRED set foo in this case

[c-blake]

Good catch. Fixed.