tools/libs/light: fix xl save -c handling

libxl_domain_resume() won't work correctly for the case it was called
due to a "xl save -c" command, i.e. to continue the suspended domain.

The information to do that is not saved in libxl__dm_resume_state for
non-HVM domains.

Fixes: 6298f0eb8f ("libxl: Re-introduce libxl__domain_resume")
Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Tested-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Acked-by: Wei Liu <wl@xen.org>

tools/libs/light/libxl_dom_suspend.c

@@ -630,12 +630,13 @@ void libxl__domain_resume(libxl__egc *egc,
         goto out;
     }
 
+    dmrs->suspend_cancel = suspend_cancel;
+
     if (type != LIBXL_DOMAIN_TYPE_HVM) {
         rc = 0;
         goto out;
     }
 
-    dmrs->suspend_cancel = suspend_cancel;
     dmrs->dm_resumed_callback = domain_resume_done;
     libxl__dm_resume(egc, dmrs); /* must be last */
     return;