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Zhuo PengMicah Kornfield
bed52ede0b5
Zhuo Peng authored and Micah Kornfield committed 7b0b79627a7
ARROW-5528: [C++] Fixed a bug when Concatenate() arrays with no value buffers.

An empty BinaryArray or a BinaryArray contains only nulls has no value
buffer.

Author: Zhuo Peng <1835738+brills@users.noreply.github.com>

Closes #4498 from brills/conc-bugfix and squashes the following commits:

89882f022 <Zhuo Peng> Use range-based for loop where it applies
5bf18bb57 <Zhuo Peng> fixed lint
eab98f56c <Zhuo Peng> Fixed lint
42063bb52 <Zhuo Peng> Fixed a bug when Concatenate() arrays with no value buffers.