Remove OOM checks: reverse_text()
Remove OOM checks: mf_alloc_bhdr()
Remove OOM checks: ml_new()
Remove OOM checks: ml_new_data()
Remove OOM checks: alloc_cmdbuff()
Remove OOM checks: realloc_cmdbuff()

put_on_cmdline() doesn't FAIL anymore but its return value was
never checked.
Remove OOM checks: alloc_typebuf()
Remove OOM checks: save_typebuf()