- very minor tweak: save 1 byte.

- very minor tweak: save 1 byte.
  statistics:
   text    data     bss     dec     hex filename
    867       0      12     879     36f fold.o.oorig.gcc-3.3
    843       0      12     855     357 fold.o.oorig.gcc-3.4
    780       0      12     792     318 fold.o.oorig.gcc-4.0
    761       0      12     773     305 fold.o.oorig.gcc-4.1-HEAD
    761       0      12     773     305 fold.o.oorig.gcc-4.2-HEAD
    866       0      12     878     36e fold.o.gcc-3.3
    842       0      12     854     356 fold.o.gcc-3.4
    779       0      12     791     317 fold.o.gcc-4.0
    760       0      12     772     304 fold.o.gcc-4.1-HEAD
    760       0      12     772     304 fold.o.gcc-4.2-HEAD