/* * Reads one character from the stream, returning the byte read. * * reader = Bzip2::Reader.new Bzip2.compress('ab') * reader.getc # => 97 * reader.getc # => 98 * reader.getc # => nil * * @return [Integer, nil] the byte value of the character read or +nil+ if eoz * has been reached */ static VALUE bz_reader_getc(VALUE obj) {