ARROW-2693: [Python] pa.chunked_array causes a segmentation fault on empty input

[xhochy]

No description provided.

[codecov-io]

Codecov Report

Merging #2128 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2128      +/-   ##
==========================================
- Coverage   86.39%   86.38%   -0.01%     
==========================================
  Files         242      230      -12     
  Lines       41481    40599     -882     
==========================================
- Hits        35838    35072     -766     
+ Misses       5643     5527     -116

Impacted Files	Coverage Δ
python/pyarrow/table.pxi	69% <100%> (+0.33%)	⬆️
python/pyarrow/tests/test_table.py	100% <100%> (ø)	⬆️
cpp/src/arrow/util/thread-pool-test.cc	98.91% <0%> (-0.55%)	⬇️
rust/src/lib.rs
rust/src/memory_pool.rs
rust/src/error.rs
rust/src/builder.rs
rust/src/memory.rs
rust/src/list_builder.rs
rust/src/list.rs
... and 6 more

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[wesm]

+1, thanks for fixing this!