ext4: remove an unneeded check in mext_page_mkuptodate()

"err" is zero here, there is no need to check again.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

fs/ext4/move_extent.c

@@ -861,8 +861,7 @@ mext_page_mkuptodate(struct page *page, unsigned from, unsigned to)
 			}
 			if (!buffer_mapped(bh)) {
 				zero_user(page, block_start, blocksize);
-				if (!err)
-					set_buffer_uptodate(bh);
+				set_buffer_uptodate(bh);
 				continue;
 			}
 		}