qcow2: Fix leaks in dirty images

When opening dirty images, qcow2's repair function should not only
repair errors but leaks as well.
Signed-off-by: NMax Reitz <mreitz@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NBenoît Canet <benoit.canet@nodalink.com>
Reviewed-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

block/qcow2.c

@@ -910,7 +910,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
         (s->incompatible_features & QCOW2_INCOMPAT_DIRTY)) {
         BdrvCheckResult result = {0};
 
-        ret = qcow2_check(bs, &result, BDRV_FIX_ERRORS);
+        ret = qcow2_check(bs, &result, BDRV_FIX_ERRORS | BDRV_FIX_LEAKS);
         if (ret < 0) {
             error_setg_errno(errp, -ret, "Could not repair dirty image");
             goto fail;