PATCH kernel/acct.c to fix compiler warning

[Brian Haslett]

This is the warning:
kernel/acct.c: In function 'do_acct_process':
kernel/acct.c:475:24: warning: unused variable 'ns' [-Wunused-variable]
  struct pid_namespace *ns = acct->ns;

and this is the patch:

Signed-off-by: Brian P. Haslett <knotwurk@xxxxxxxxx>
--- a/kernel/acct.c 2014-11-11 10:25:49.000000000 +0000
+++ b/kernel/acct.c 2014-11-11 10:25:40.000000000 +0000
@@ -472,7 +472,9 @@ static void do_acct_process(struct bsd_a
    acct_t ac;
    unsigned long flim;
    const struct cred *orig_cred;
+#if ACCT_VERSION == 3
    struct pid_namespace *ns = acct->ns;
+#endif
    struct file *file = acct->file;

    /*
--
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