gnucash maint: Fix broken test-backend-dbi with libdbi 0.9.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/321a159a (commit)
	from  https://github.com/Gnucash/gnucash/commit/b465fef9 (commit)



commit 321a159af29a9b51fe793c2528dccb74b0443bf9
Author: John Ralls <jralls at ceridwen.us>
Date:   Thu Aug 7 10:00:39 2014 -0700

    Fix broken test-backend-dbi with libdbi 0.9.
    
    Segfaulted for an uninitialized dbi_instance.



Summary of changes:
 configure.ac                                  | 2 +-
 src/backend/dbi/test/test-backend-dbi-basic.c | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)