STATE_SIGNATURE  1047 contrib/tools/pngfix.c    file->state = STATE_SIGNATURE;
STATE_SIGNATURE  3216 contrib/tools/pngfix.c       if (file->state == STATE_SIGNATURE)
STATE_SIGNATURE  3276 contrib/tools/pngfix.c       if (file->state != STATE_SIGNATURE && chunk == NULL)
STATE_SIGNATURE  3313 contrib/tools/pngfix.c             if (file->state == STATE_SIGNATURE)