init: Fix comment

Apparently "pid-1" confuses people...

Requested-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: torvalds@linux-foundation.org
Cc: randy.dunlap@oracle.com
Cc: Ilya Loginov <isloginov@gmail.com>
LKML-Reference: <1277887031.1868.82.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

init/main.c

@@ -431,7 +431,7 @@ static noinline void __init_refok rest_init(void)
 
 	rcu_scheduler_starting();
 	/*
-	 * We need to spawn init first so that it obtains pid-1, however
+	 * We need to spawn init first so that it obtains pid 1, however
 	 * the init task will end up wanting to create kthreads, which, if
 	 * we schedule it before we create kthreadd, will OOPS.
 	 */