init: Fix comment

Apparently "pid-1" confuses people...

Requested-by: Randy Dunlap <[e-mail]>
Signed-off-by: Peter Zijlstra <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: Ilya Loginov <[e-mail]>
LKML-Reference: <1277887031.1868.82.camel@laptop>
Signed-off-by: Ingo Molnar <[e-mail]>

init/main.c

···
 
 	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.
 	 */