util: Move error reporting back to virFileWrapperFdClose()
virFileWrapperFdFree(), like all free functions, is supposed
to only release allocated resources, so error reporting is
better suited for virFileWrapperFdClose().
This reverts commit b0c3e931804a86cd7146db0164ab4843039c410b.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>