proc_sys_revalidate: fix Oops on NULL nameidata (bnc#907551).

suse-commit: fda7acf32de276c01c2f4ebefd40070d0be3e457
Merge branch 'SLE11-SP3' into SLE11-SP4

Conflicts:
	series.conf

suse-commit: 0da9cc83d8c3c279bfb41b2cd2bd3022191e5a64