It should be possible to make bitset! from another bitset! (no error)

[Oldes]

Currently:

>> charset charset "a"
** Script error: charset does not allow bitset! for its chars argument

>> make bitset! charset #"a"
** Script error: invalid argument: make bitset! #{00000000000000000000000040}
** Where: make
** Near: make bitset! charset #"a"

Above should just make a copy as in Red:

>> charset charset "a"
== make bitset! #{00000000000000000000000040}
>> b1: charset "" b2: make bitset! b1
== make bitset! #{00}
>> b2/1: true
== true
>> b2
== make bitset! #{40}
>> b1
== make bitset! #{00}