->latency_record is defined as
	struct latency_record[LT_SAVECOUNT];
so use the same macro whie iterating.
Link: http://lkml.kernel.org/r/20180627200534.GA18434@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 
        if (!task)
                return -ESRCH;
        seq_puts(m, "Latency Top version : v0.1\n");
-       for (i = 0; i < 32; i++) {
+       for (i = 0; i < LT_SAVECOUNT; i++) {
                struct latency_record *lr = &task->latency_record[i];
                if (lr->backtrace[0]) {
                        int q;