Commits
François Saint-Jacques authored and Wes McKinney committed 90eeb4a2d3d
ARROW-4364: [C++] Fix CHECKIN warnings Author: François Saint-Jacques <fsaintjacques@gmail.com> Closes #3478 from fsaintjacques/ARROW-4364-fix-everything-warnings and squashes the following commits: 9b4eee43 <François Saint-Jacques> Add missing includes 28dba789 <François Saint-Jacques> Make clang warning happy b94c98a3 <François Saint-Jacques> ARROW-4364: Fix -Wextra -Weverything warnings