Fix reshape

Author: davidbrochart

test/test_xchunk_store_manager.cpp

@@ -143,7 +143,8 @@ namespace xt
         std::string chunk_dir2 = "files5";
         fs::create_directory(chunk_dir2);
         auto a2 = chunked_file_array<double, xio_disk_handler<xio_binary_config>>(shape, chunk_shape, chunk_dir2);
-        auto a3 = arange(4 * 4).reshape({4, 4});
+        auto a3 = arange(4 * 4);
+        a3.reshape({4, 4});
         a2 = a3;
         a2.chunks().flush();
         // check that a2 has correct chunks