fix zero size case for getxattr and listxattr
diff --git a/include/linux/fuse.h b/include/linux/fuse.h
index f641271..8467ed6 100644
--- a/include/linux/fuse.h
+++ b/include/linux/fuse.h
@@ -197,7 +197,11 @@
 	unsigned int flags;
 };
 
-struct fuse_getlistxattr_in {
+struct fuse_getxattr_in {
+	unsigned int size;
+};
+
+struct fuse_getxattr_out {
 	unsigned int size;
 };