tools/xl: check return value of printf_info_one_json() in list_domains_details()

And return from the function early if printf_info_one_json() returns error.

Reported by internal XenServer Coverity instance.

Fixes: f6c6f2679d ("libxl: Convert libxl__object_to_json() to json-c")
Signed-off-by: Roger Pau Monné <roger.pua@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jason Andryuk <jason.andryuk@amd.com>
Release-Acked-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>

tools/xl/xl_info.c

@@ -584,6 +584,8 @@ static void list_domains_details(const libxl_dominfo *info, int nb_domain)
 #ifdef HAVE_LIBJSONC
             json_object *jso_value;
             rc = printf_info_one_json(&jso_value, info[i].domid, &d_config);
+            if (rc)
+                goto out;
             json_object_array_add(jso, jso_value);
 #elif defined(HAVE_LIBYAJL)
             s = printf_info_one_json(hand, info[i].domid, &d_config);