audit: audit_set_auditable defined but not used

after 0590b9335a1c72a3f0defcc6231287f7817e07c8 audit_set_auditable() is now only
used by the audit tree code. If CONFIG_AUDIT_TREE is unset it will be defined
but unused. This patch simply moves the function inside a CONFIG_AUDIT_TREE
block.

cc1: warnings being treated as errors
/home/acme_unencrypted/git/linux-2.6-tip/kernel/auditsc.c:745: error: ‘audit_set_auditable’ defined but not used
make[2]: *** [kernel/auditsc.o] Error 1
make[1]: *** [kernel] Error 2
make[1]: *** Waiting for unfinished jobs....

Signed-off-by: Eric Paris <[e-mail]>
Signed-off-by: Al Viro <[e-mail]>

kernel/auditsc.c

···
  */
 
 #ifdef CONFIG_AUDIT_TREE
+static void audit_set_auditable(struct audit_context *ctx)
+{
+	if (!ctx->prio) {
+		ctx->prio = 1;
+		ctx->current_state = AUDIT_RECORD_CONTEXT;
+	}
+}
+
 static int put_tree_ref(struct audit_context *ctx, struct audit_chunk *chunk)
 {
 	struct audit_tree_refs *p = ctx->trees;
···
 		}
 	}
 	rcu_read_unlock();
-}
-
-static void audit_set_auditable(struct audit_context *ctx)
-{
-	if (!ctx->prio) {
-		ctx->prio = 1;
-		ctx->current_state = AUDIT_RECORD_CONTEXT;
-	}
 }
 
 static inline struct audit_context *audit_get_context(struct task_struct *tsk,