frees
ACTION: deallocates a bstring
USE: frees bstring freememory
EXAMPLE:
b=news 1000
'...
frees b

RESULT:
b contains address of a string of 1000 nul characters . Then the sting is freed

REMARKS: Oxygen strings are automatically freed but Bstrings must be explicitly freed when no longer needed.

RELATED: news nuls freememory getmemory