mm/kmemleak.c: remove unneeded initialization of object to NULL

Few lines below object is reinitialized by lookup_object() so we don't
need to init it by NULL in the beginning of find_and_get_object().

Signed-off-by: Alexey Klimov <alexey.klimov@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/kmemleak.c

@@ -479,7 +479,7 @@ static void put_object(struct kmemleak_object *object)
 static struct kmemleak_object *find_and_get_object(unsigned long ptr, int alias)
 {
 	unsigned long flags;
-	struct kmemleak_object *object = NULL;
+	struct kmemleak_object *object;
 
 	rcu_read_lock();
 	read_lock_irqsave(&kmemleak_lock, flags);