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由 Peter Krempa 提交于
Previously the code called virStorageSourceUpdateBlockPhysicalSize which did not do anything on empty drives since it worked only on block devices. After the refactor in c5f61513 it's called for all devices and thus attempts to deref the NULL path of empty drives. Add a check that skips the update of the physical size if the storage source is empty. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1420718
c3de3873