orangefs: don't let orangefs_iget return NULL.

Suggested by Dan Carpenter.
Signed-off-by: Mike Marshall <hubcap@omnibond.com>

fs/orangefs/inode.c

@@ -405,7 +405,11 @@ struct inode *orangefs_iget(struct super_block *sb,
 			orangefs_test_inode,
 			orangefs_set_inode,
 			ref);
-	if (!inode || !(inode->i_state & I_NEW))
+
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+
+	if (!(inode->i_state & I_NEW))
 		return inode;
 
 	error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL);