fix: issue with empty big_endian array

[pfackeldey]

Fixes problem with 0-length arrays and writing, e.g.:

import uproot

events = uproot.dask({"coffea/tests/samples/nano_dy.root": "Events"})

uproot.dask_write(
  events[events.nJet > 10],  # cuts away all events
  destination="skimtest/",
  prefix="nano_dy/skimmed",
  compute=True,
)

[pfackeldey]

@ariostas do you have an idea what's wrong with the pyodide build?

[ariostas]

do you have an idea what's wrong with the pyodide build?

I'm not sure. I'll see if something broke upstream

[ariostas]

Looks good to me!

[ianna]

@pfackeldey - Thanks for fixing this!

[ianna]

Hmm… it’s a decompression failure:

=================================== FAILURES ===================================
________________________ test_read_rntuple_http[chrome] ________________________


>   arrays = obj.arrays()


tests-wasm/test_1272_basic_functionality.py:131: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/lib/python3.12/site-packages/uproot/behaviors/RNTuple.py:641: in arrays
    ???
/lib/python3.12/site-packages/uproot/behaviors/RNTuple.py:438: in num_entries
    ???
/lib/python3.12/site-packages/uproot/models/RNTuple.py:319: in cluster_summaries
    ???
/lib/python3.12/site-packages/uproot/models/RNTuple.py:362: in page_list_envelopes
    ???
/lib/python3.12/site-packages/uproot/models/RNTuple.py:303: in footer
    ???
/lib/python3.12/site-packages/uproot/models/RNTuple.py:201: in header
    ???
/lib/python3.12/site-packages/uproot/models/RNTuple.py:160: in _prepare_header_chunk
    ???
/lib/python3.12/site-packages/uproot/compression.py:463: in decompress
    ???
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

>   ???
E   cramjam.DecompressionError: incomplete frame


/lib/python3.12/site-packages/uproot/compression.py:309: DecompressionError
----------------------------- Captured stdout call -----------------------------

[ariostas]

Hmm… it’s a decompression failure:

This is fixed in #1422. An update in Chrome broke something