[libvirt PATCH] qemu: Fix error propagation in qemuMigrationBegin

[Peter Krempa]

On Mon, May 23, 2022 at 12:55:17 +0200, Jiri Denemark wrote:
> Commit v8.3.0-152-g49ef0f95c6 removed explicit VIR_FREE from
> qemuMigrationBegin, effectively reverting v1.2.14-57-g77ddd0bba2
> 
> The xml variable was used to hold the return value and thus had to be
> unset when an error happened after xml was already non-NULL. Such code
> may be quite confusing though and we usually avoid it by not storing
> anything to a return variable until everything succeeded.
> 
> Signed-off-by: Jiri Denemark <jdenemar at redhat.com>
> ---
>  src/qemu/qemu_migration.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)

Oops.

Reviewed-by: Peter Krempa <pkrempa at redhat.com>