boolean           520 libgd/gd_jpeg.c typedef boolean safeboolean;
boolean           117 libgd/gd_topal.c #ifndef boolean
boolean           312 libgd/gd_topal.c   boolean needs_zeroed;		/* TRUE if next pass must zero histogram */
boolean           322 libgd/gd_topal.c   boolean on_odd_row;		/* flag to remember which row we are on */