tree 7317f922f077f3b43f22c620cad284876581799f
parent bf3cf7514ef6c59e0d91090f62f0ecb042fc9dc0
author Nan Zhou <nanzhoumails@gmail.com> 1640718146 -0800
committer Nan Zhou <nanzhoumails@gmail.com> 1640739120 -0800

Modernize use nullptr

NULL => nullptr as per modernize-use-nullptr.

After this change:
```
grep "NULL" -r */*.*pp *.*pp
None
```

Signed-off-by: Nan Zhou <nanzhoumails@gmail.com>
Change-Id: Iecddab6fba06f959866048eff4496310453d0fde