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4186f92935
virDrvSupportsFeature API is allowed to return -1 on error while all but one uses of VIR_DRV_SUPPORTS_FEATURE only check for (non)zero return value. Let's make this macro return zero on error, which is what everyone expects anyway.
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>