[SSSD] [PATCH] Coverity issues in python HBAC bindings

[Jakub Hrozek]

[PATCH 1/2] Remove dead code from python HBAC bindings
As Coverity noticed, we check for s != NULL in both if and else branches.

[PATCH 2/2] Handle allocation error in python HBAC bindings
This is kinda embarrassing, but the body of a NULL check was completely
missing.