gnucash maint: Ensure all C++ class member raw pointers are default-initialized to nullptr.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/2f861bc2 (commit)
	from  https://github.com/Gnucash/gnucash/commit/1e87d069 (commit)



commit 2f861bc2a49d77cecce056cbc605a74d0b963f5a
Author: John Ralls <jralls at ceridwen.us>
Date:   Fri Aug 10 12:21:28 2018 -0700

    Ensure all C++ class member raw pointers are default-initialized to nullptr.



Summary of changes:
 libgnucash/backend/dbi/gnc-dbisqlconnection.cpp       | 2 +-
 libgnucash/backend/dbi/gnc-dbisqlconnection.hpp       | 2 +-
 libgnucash/backend/dbi/gnc-dbisqlresult.hpp           | 4 ++--
 libgnucash/backend/sql/gnc-sql-backend.hpp            | 6 +++---
 libgnucash/backend/sql/gnc-sql-column-table-entry.hpp | 6 +++---
 libgnucash/backend/sql/gnc-sql-object-backend.hpp     | 6 +++---
 libgnucash/engine/test/test-kvp-frame.cpp             | 4 ++--
 7 files changed, 15 insertions(+), 15 deletions(-)