[9fans] Bgetrune while(i>runesize) loop

[Pietro Gagliardi]

Hello. I was looking at the code for the Bgetrune function trying to  
implement a readrune() around read(). It works, but without a  
counterpart for this:

                while(i > bp->runesize) {
                        Bungetc(bp);
                        i--;
                }
What is the point of that loop? Thanks.