[CRIU] [PATCH 1/7] image: Refine open_image helpers

[Cyrill Gorcunov]

Because we're merging image files one into another
for backward compatibility we need to try to access
old image files without producing error message if
such image file doesn't exist.

Thus alternate open_image to take @optional argument,
which makes it exit with -ENOENT error code but don't
print any error message if file doesn't exits.

Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
---
 image.c         |  4 +++-
 include/image.h | 15 +++++++++++++--
 2 files changed, 16 insertions(+), 3 deletions(-)

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