Fix possible NULL pointer dereference.

[vitek]

This caused SEGFAULT when moving sql3 db from 1.7 to 1.9. With this fix I've managed to use old db successfully.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 72.41%. Comparing base (1b3aab9) to head (c8bb90e). Report is 1 commits behind head on master.

Files	Patch %	Lines
src/lib/db.c	0.00%	5 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #858      +/-   ##
==========================================
- Coverage   72.43%   72.41%   -0.02%     
==========================================
  Files          34       34              
  Lines        9773     9775       +2     
==========================================
  Hits         7079     7079              
- Misses       2694     2696       +2     

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[vitek]

So overall the diff is fine, but you need to squash your two commits into one and improve the commit message and add Fixes: #845 and don't forget to signoff on your commit. Thanks!

So overall the diff is fine, but you need to squash your two commits into one and improve the commit message and add Fixes: #845 and don't forget to signoff on your commit. Thanks!

done