qemu_driver.c

Commit 28a06215 added support to restore
sparse images but changed the boolean that controls if we open the file
as read-only or read-write. Editing XML in the save image resulted in
following error message:

    failed to write header to domain save file '/data/images/fedora40.save': Bad file descriptor

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Jim Fehlig <jfehlig@suse.com>