[libvirt] [PATCH 0/4] Fixes to some bugs encountered testing virInterface*

[Laine Stump <laine laine org>]

This series of patches fixes some problems I found while testing the
virInterface implementation.

Note that the 3rd patch in the series only fixes virInterface-related
instances of the problem (releasing the conn lock before reporting
errors). If that patch is approved, a similar thing must be done for
several other functions in datatypes.c.