Pass test-freadseek on cygwin. * modules/freadseek (Depends-on): Use freadptr, not freadseek. * lib/freadseek.c (freadseek): Don't increment beyond bounds of ungetc buffer. * tests/test-fflush2.c (main): Fix typo. Signed-off-by: Eric Blake <ebb9@byu.net>