kernel/auditsc.c: fix an off-by-one

This patch fixes an off-by-one in a BUG_ON() spotted by the Coverity
checker.

Signed-off-by: Adrian Bunk <[e-mail]>
Cc: Amy Griffis <[e-mail]>
Cc: Al Viro <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

kernel/auditsc.c

···
 		axp->d.next = ctx->aux_pids;
 		ctx->aux_pids = (void *)axp;
 	}
-	BUG_ON(axp->pid_count > AUDIT_AUX_PIDS);
+	BUG_ON(axp->pid_count >= AUDIT_AUX_PIDS);
 
 	axp->target_pid[axp->pid_count] = t->tgid;
 	selinux_get_task_sid(t, &axp->target_sid[axp->pid_count]);