create_strlit

Create a string.
This function creates a string (the string type is determined by the value
of get_inf_attr(INF_STRTYPE))
  ea      - linear address
  len     - length of the string in bytes
returns: 1-ok, 0-failure
note: the type of an existing string is returned by get_str_type()

success create_strlit(long ea, long len=0);