ocfs2/dlm: remove redundant null pointer check

kfree on a NULL pointer is a no-op.  Remove the redundant null pointer
check.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/ocfs2/dlm/dlmrecovery.c

@@ -1498,9 +1498,7 @@ int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data,
 
 	dlm_put(dlm);
 	if (ret < 0) {
-		if (buf)
 		kfree(buf);
-		if (item)
 		kfree(item);
 		mlog_errno(ret);
 	}