Michal Privoznik 611a278fa4 storageVolCreateXMLFrom: Check if backend knows how to createVol
It is highly unlikely that a backend will know how to create a
volume from a different volume (buildVolFrom) and not know how to
create an empty volume (createVol). But:
1) we call the function without any prior check so if that's the
case we would SIGSEGV immediatelly
2) it's better to be safe than sorry.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-02-12 16:16:58 +01:00
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