Fix dtype expansion during store initialization

Otherwise, array data would not match shape with unstructured dtype.

Author: Tarik Onalan

zarr/storage.py

@@ -329,8 +329,9 @@ def _init_array_metadata(store, shape, chunks=None, dtype=None, compressor='defa
         err_contains_group(path)
 
     # normalize metadata
-    shape = normalize_shape(shape)
     dtype, object_codec = normalize_dtype(dtype, object_codec)
+    shape = normalize_shape(shape) + dtype.shape
+    dtype = dtype.base
     chunks = normalize_chunks(chunks, shape, dtype.itemsize)
     order = normalize_order(order)
     fill_value = normalize_fill_value(fill_value, dtype)