pid: Fix spelling in comments

Accidentally discovered this typo when I studied this module.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tianhong Ding <dingtianhong@huawei.com>
Cc: Xinwei Hu <huxinwei@huawei.com>
Cc: Zefan Li <lizefan@huawei.com>
Link: http://lkml.kernel.org/r/1454119457-11272-1-git-send-email-thunder.leizhen@huawei.comSigned-off-by: Ingo Molnar <mingo@kernel.org>

kernel/pid.c

@@ -588,7 +588,7 @@ void __init pidhash_init(void)
 
 void __init pidmap_init(void)
 {
-	/* Veryify no one has done anything silly */
+	/* Verify no one has done anything silly: */
 	BUILD_BUG_ON(PID_MAX_LIMIT >= PIDNS_HASH_ADDING);
 
 	/* bump default and minimum pid_max based on number of cpus */