See: https://github.com/docker/docker/issues/10867
While looking at #10867 I noticed that the error message generated for
a blank image ID wasn't very helpful so this fixes that.
Signed-off-by: Doug Davis <dug@us.ibm.com>
Upstream-commit: eeb36c9348b7af339638936a98d66ee4f9be62ee
Component: engine