Monitor: Convert do_cont() to cmd_new_ret()

Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

monitor.c

@@ -1148,14 +1148,18 @@ struct bdrv_iterate_context {
 /**
  * do_cont(): Resume emulation.
  */
-static void do_cont(Monitor *mon, const QDict *qdict, QObject **ret_data)
+static int do_cont(Monitor *mon, const QDict *qdict, QObject **ret_data)
 {
     struct bdrv_iterate_context context = { mon, 0 };
 
     bdrv_iterate(encrypted_bdrv_it, &context);
     /* only resume the vm if all keys are set and valid */
-    if (!context.err)
+    if (!context.err) {
         vm_start();
+        return 0;
+    } else {
+        return -1;
+    }
 }
 
 static void bdrv_key_cb(void *opaque, int err)

qemu-monitor.hx

@@ -318,7 +318,7 @@ ETEXI
         .params     = "",
         .help       = "resume emulation",
         .user_print = monitor_user_noop,
-        .mhandler.cmd_new = do_cont,
+        .cmd_new_ret = do_cont,
     },
 
 STEXI