Doug Davis bafff954ca Check volume path to make sure its not the empty string ...

With this Dockerfile
```
FROM ubuntu
ENV ABC=""
VOLUME $ABC
```

It builds ok but then at run time I get this error:

FATA[0002] Error response from daemon: Cannot start container 8902b4a7aaf5c4e4b11a38070d392db465fa97ad88c91c8b38dda5ab8149ccac: [8] System error: no such file or directory

Because the Volume config shows "" as the path.  This PR checks for "" as
the path and stops it at build time.

Signed-off-by: Doug Davis <dug@us.ibm.com>
Upstream-commit: 8071bf396747d3ad01db504a417b75fe7a52608a
Component: engine

2015-03-20 21:39:49 -07:00

components/engine

Check volume path to make sure its not the empty string

2015-03-20 21:39:49 -07:00

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