Description of problem:
busybox's ls does not produce output if stdout is not a tty. This breaks the
kexec-tools initramfs

Version-Release number of selected component (if applicable):
busybox-1.2.2-6.fc7


How reproducible:
always

Steps to Reproduce:
1. busybox ls -1 | cat
2. busybox ls -1
3.
  
Actual results:
first command always returns empty output

Expected results:
commands show same output

Additional info:
(the '-1' arg is to make sure the output would be the same if the bug was
absent. it is not needed to trigger the bug)